path: root/release-notes/OTP-18.2.README.txt

Patch Package:           OTP 18.2
Git Tag:                 OTP-18.2
Date:                    2015-12-16
Trouble Report Id:       OTP-12003, OTP-12392, OTP-12457, OTP-12699,
                         OTP-12759, OTP-12787, OTP-12792, OTP-12836,
                         OTP-12837, OTP-12838, OTP-12936, OTP-12939,
                         OTP-12966, OTP-12985, OTP-13000, OTP-13007,
                         OTP-13008, OTP-13010, OTP-13015, OTP-13017,
                         OTP-13018, OTP-13026, OTP-13029, OTP-13030,
                         OTP-13031, OTP-13032, OTP-13035, OTP-13040,
                         OTP-13042, OTP-13044, OTP-13048, OTP-13052,
                         OTP-13054, OTP-13055, OTP-13063, OTP-13066,
                         OTP-13067, OTP-13068, OTP-13069, OTP-13070,
                         OTP-13071, OTP-13076, OTP-13078, OTP-13079,
                         OTP-13083, OTP-13084, OTP-13091, OTP-13092,
                         OTP-13093, OTP-13101, OTP-13102, OTP-13105,
                         OTP-13106, OTP-13107, OTP-13109, OTP-13110,
                         OTP-13113, OTP-13115, OTP-13116, OTP-13117,
                         OTP-13125, OTP-13130, OTP-13132, OTP-13134,
                         OTP-13137, OTP-13141, OTP-13142, OTP-13143,
                         OTP-13144, OTP-13145, OTP-13146, OTP-13147,
                         OTP-13149, OTP-13150, OTP-13155, OTP-13156,
                         OTP-13157, OTP-13158, OTP-13159, OTP-13160,
                         OTP-13162, OTP-13163, OTP-13165, OTP-13166,
                         OTP-13173, OTP-13181, OTP-13188, OTP-13189
Seq num:                 seq12945, seq12959, seq12978
System:                  OTP
Release:                 18
Application:             asn1-4.0.1, common_test-1.11.1,
                         compiler-6.0.2, crypto-3.6.2, dialyzer-2.8.2,
                         diameter-1.11.1, erl_docgen-0.4.1,
                         erl_interface-3.8.1, erts-7.2, eunit-2.2.12,
                         hipe-3.14, inets-6.1, jinterface-1.6.1,
                         kernel-4.1.1, observer-2.1.1,
                         parsetools-2.1.1, public_key-1.1,
                         runtime_tools-1.9.2, sasl-2.6.1, snmp-5.2.1,
                         ssh-4.2, ssl-7.2, stdlib-2.7,
                         test_server-3.9.1, tools-2.8.2, typer-0.9.10,
                         wx-1.6, xmerl-1.3.9
Predecessor:             OTP 18.1.5

 Check out the git tag OTP-18.2, and build a full OTP system including
 documentation. Apply one or more applications from this build as
 patches to your installation using the 'otp_patch_apply' tool. For
 information on install requirements, see descriptions for each
 application version below.

 ---------------------------------------------------------------------
 --- HIGHLIGHTS ------------------------------------------------------
 ---------------------------------------------------------------------

  OTP-12392    Application(s): ssl

               Add upper limit for session cache, configurable on ssl
               application level.

               If upper limit is reached, invalidate the current cache
               entries, e.i the session lifetime is the max time a
               session will be keept, but it may be invalidated
               earlier if the max limit for the table is reached. This
               will keep the ssl manager process well behaved, not
               exhusting memeory. Invalidating the entries will
               incrementally empty the cache to make room for fresh
               sessions entries.


 ---------------------------------------------------------------------
 --- asn1-4.0.1 ------------------------------------------------------
 ---------------------------------------------------------------------

 The asn1-4.0.1 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13149    Application(s): asn1

               Trying to encode an empty named BIT STRING in BER would
               fail with a function_clause exception. (Thanks to
               Svilen Ivanov for reporting this bug.)


 Full runtime dependencies of asn1-4.0.1: erts-7.0, kernel-3.0,
 stdlib-2.0


 ---------------------------------------------------------------------
 --- common_test-1.11.1 ----------------------------------------------
 ---------------------------------------------------------------------

 The common_test-1.11.1 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13007    Application(s): common_test

               When data from the netconf server was split into many
               ssh packages, the netconf client performed really bad.
               This is now improved.


  OTP-13008    Application(s): common_test

               In ct_netconfc, if a timer expired 'at the same time'
               as the server sent the rpc-reply, the timeout message
               might already be in the client's message queue when the
               client removed the timer ref from its 'pending' list.
               This caused a crash in the client since the timer ref
               could no longer be found when handling the timeout
               message. This problem is now fixed by always flushing
               the timeout message from the message queue when
               canceling a timer.


  OTP-13035    Application(s): common_test

               The error logger handler ct_conn_log_h did not respect
               the 'silent' option, and tried to print to an undefined
               file descriptor. This has been corrected.


  OTP-13173    Application(s): common_test
               Related Id(s): seq12978

               If the user would let the test run proceed after test
               suite compilation failure, Common Test did not set the
               exit status to indicate failure as expected. This has
               been corrected. Also, the 'abort_if_missing_suites'
               option now makes Common Test abort the test run without
               asking the user if compilation fails, even if access to
               stdin/stdout exists.


  OTP-13181    Application(s): common_test, test_server

               With the Common Test 'create_priv_dir' start option set
               to 'auto_per_tc', the name of the priv directory for a
               configuration function could clash with the name of the
               priv directory for a test case, which would cause Test
               Server failure. This error has been corrected.


 Full runtime dependencies of common_test-1.11.1: compiler-6.0,
 crypto-3.6, debugger-4.1, erts-7.0, inets-6.0, kernel-4.0,
 observer-2.1, runtime_tools-1.8.16, sasl-2.4.2, snmp-5.1.2, ssh-4.0,
 stdlib-2.5, test_server-3.9, tools-2.8, xmerl-1.3.8


 ---------------------------------------------------------------------
 --- compiler-6.0.2 --------------------------------------------------
 ---------------------------------------------------------------------

 The compiler-6.0.2 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13091    Application(s): compiler

               Fix cerl_trees:label/2 bug with map K/V swap


  OTP-13113    Application(s): compiler

               Warnings produced when the 'bin_opt_info' option was
               given could sometimes lack filenames and line numbers.
               (Thanks to José Valim for reporting this bug.)


 Full runtime dependencies of compiler-6.0.2: crypto-3.6, erts-7.0,
 hipe-3.12, kernel-4.0, stdlib-2.5


 ---------------------------------------------------------------------
 --- crypto-3.6.2 ----------------------------------------------------
 ---------------------------------------------------------------------

 The crypto-3.6.2 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13017    Application(s): crypto, erts, eunit, snmp

               Small documentation fixes


 Full runtime dependencies of crypto-3.6.2: erts-6.0, kernel-3.0,
 stdlib-2.0


 ---------------------------------------------------------------------
 --- dialyzer-2.8.2 --------------------------------------------------
 ---------------------------------------------------------------------

 Note! The dialyzer-2.8.2 application can *not* be applied
       independently of other applications on an arbitrary OTP 18
       installation.

       On a full OTP 18 installation, also the following runtime
       dependency has to be satisfied:
       -- hipe-3.13 (first satisfied in OTP 18.1)


 --- Fixed Bugs and Malfunctions ---

  OTP-13068    Application(s): dialyzer, hipe

               Reintroduce the erlang:make_fun/3 BIF in erl_bif_types.


 Full runtime dependencies of dialyzer-2.8.2: compiler-5.0, erts-7.0,
 hipe-3.13, kernel-3.0, stdlib-2.5, syntax_tools-1.6.14, wx-1.2


 ---------------------------------------------------------------------
 --- diameter-1.11.1 -------------------------------------------------
 ---------------------------------------------------------------------

 The diameter-1.11.1 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13137    Application(s): diameter

               Fix request table leaks

               The End-to-End and Hop-by-Hop identifiers of outgoing
               Diameter requests are stored in a table in order for
               the caller to be located when the corresponding answer
               message is received. Entries were orphaned if the
               handler was terminated by an exit signal as a
               consequence of actions taken by callback functions, or
               if callbacks modified identifiers in retransmission
               cases.


 Full runtime dependencies of diameter-1.11.1: erts-6.0, kernel-3.0,
 ssl-5.3.4, stdlib-2.0


 ---------------------------------------------------------------------
 --- erl_docgen-0.4.1 ------------------------------------------------
 ---------------------------------------------------------------------

 The erl_docgen-0.4.1 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Improvements and New Features ---

  OTP-13026    Application(s): erl_docgen, erts

               Updated the xmllint target to just check the xml files
               with real documentation content.
               Corrected some errors and added some missing target in
               the DTD's.


 Full runtime dependencies of erl_docgen-0.4.1: edoc-0.7.13, erts-6.0,
 stdlib-2.5, xmerl-1.3.7


 ---------------------------------------------------------------------
 --- erl_interface-3.8.1 ---------------------------------------------
 ---------------------------------------------------------------------

 The erl_interface-3.8.1 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Improvements and New Features ---

  OTP-13188    Application(s): erl_interface

               Fix the conditional selection of gethostbyname_r and
               gethostbyaddr_r.


 ---------------------------------------------------------------------
 --- erts-7.2 --------------------------------------------------------
 ---------------------------------------------------------------------

 The erts-7.2 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13017    Application(s): crypto, erts, eunit, snmp

               Small documentation fixes


  OTP-13076    Application(s): erts
               Related Id(s): seq12959

               Fix memory corruption bug caused by disabling
               distribution and then re-enable distribution with a
               node name that has previously been used by a remote
               node.


  OTP-13079    Application(s): erts

               Renamed variables with name bool as Visual Studio 2015
               now treats this is a keyword.


  OTP-13102    Application(s): erts

               erl_prim_loader has not supported custom loaders for
               several releases. In the documentation for
               erl_prim_loader, all references to custom loaders have
               now been removed.


  OTP-13105    Application(s): erts

               Fixed compilation of erts together with libc versions
               that do not define __uint32_t.


  OTP-13107    Application(s): erts

               erl -make now returns non-zero exit codes on failure


  OTP-13115    Application(s): erts

               Fix crash on init:restart in embedded mode caused by
               on_load handler process not being relaunched leading to
               load failure for modules such as crypto and asn1rt_nif
               that need it to be present for correct NIF loading.


  OTP-13125    Application(s): erts

               Fix maps decode in erlang:binary_to_term/1

               Decoding a term with a large (HAMT) map in an small
               (FLAT) map could cause a critical error if the external
               format was not produced by beam.


  OTP-13146    Application(s): erts

               Fix very rare bug in GC when big maps with a lot of
               hash collisions from a remote node are waiting in inner
               message queue.


  OTP-13150    Application(s): erts

               Fixed a bug that could cause a crash dump to become
               almost empty.


 --- Improvements and New Features ---

  OTP-13026    Application(s): erl_docgen, erts

               Updated the xmllint target to just check the xml files
               with real documentation content.
               Corrected some errors and added some missing target in
               the DTD's.


  OTP-13147    Application(s): erts

               Add function enif_getenv to read OS environment
               variables in a portable way from NIFs.


 Full runtime dependencies of erts-7.2: kernel-4.0, sasl-2.4,
 stdlib-2.5


 ---------------------------------------------------------------------
 --- eunit-2.2.12 ----------------------------------------------------
 ---------------------------------------------------------------------

 The eunit-2.2.12 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13017    Application(s): crypto, erts, eunit, snmp

               Small documentation fixes


 Full runtime dependencies of eunit-2.2.12: erts-6.0, kernel-3.0,
 stdlib-2.5


 ---------------------------------------------------------------------
 --- hipe-3.14 -------------------------------------------------------
 ---------------------------------------------------------------------

 Note! The hipe-3.14 application can *not* be applied independently of
       other applications on an arbitrary OTP 18 installation.

       On a full OTP 18 installation, also the following runtime
       dependency has to be satisfied:
       -- erts-7.1 (first satisfied in OTP 18.1)


 --- Fixed Bugs and Malfunctions ---

  OTP-13048    Application(s): hipe

               Fix hipe bug causing segfaults when native code
               constructs binaries starting with a zero-length integer
               field.


  OTP-13068    Application(s): dialyzer, hipe

               Reintroduce the erlang:make_fun/3 BIF in erl_bif_types.


  OTP-13092    Application(s): hipe

               In certain cases of matching with very big binaries,
               the HiPE compiler generated code that would fail the
               match, even in cases that the matching was successful.
               The problem was more quite noticeable on 32-bit
               platforms.


 --- Improvements and New Features ---

  OTP-13159    Application(s): hipe

               mikpe/hipe_x86_signal-musl-support


 Full runtime dependencies of hipe-3.14: compiler-5.0, erts-7.1,
 kernel-3.0, stdlib-2.5, syntax_tools-1.6.14


 ---------------------------------------------------------------------
 --- inets-6.1 -------------------------------------------------------
 ---------------------------------------------------------------------

 The inets-6.1 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13069    Application(s): inets

               Replace obs-folds with spaces instead of failing


  OTP-13071    Application(s): inets

               Add validation fun for URI scheme to http_uri API


  OTP-13093    Application(s): inets

               Handle stream bodies as documented.


  OTP-13110    Application(s): inets

               Correct error handling of mod_esi generated chunks.
               Send warning headers in chunk trailers instead of
               generating an unexpected additional 500 request
               response, when problems, such as a timeout occurs.


  OTP-13117    Application(s): inets

               HTTP client terminates gracefully when an invalid
               chunked length header is encountered.


 --- Improvements and New Features ---

  OTP-12985    Application(s): inets

               Add default for SNI (Server Name Indication) when
               running https using the inets HTTP-client.


  OTP-13116    Application(s): inets

               Be forgiving to chunked sizes that have trailing
               whitespaces as prior implementation was. Also some
               legacy embedded devices does actually have trailing
               whitespaces even though this in not according to the
               spec.


 Full runtime dependencies of inets-6.1: erts-6.0, kernel-3.0,
 mnesia-4.12, runtime_tools-1.8.14, ssl-5.3.4, stdlib-2.0


 ---------------------------------------------------------------------
 --- jinterface-1.6.1 ------------------------------------------------
 ---------------------------------------------------------------------

 The jinterface-1.6.1 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13106    Application(s): jinterface

               Add missing Term tag matching switch statement that was
               missing an external fun tag.


  OTP-13165    Application(s): jinterface

               fixed writing small compressed values.


 ---------------------------------------------------------------------
 --- kernel-4.1.1 ----------------------------------------------------
 ---------------------------------------------------------------------

 Note! The kernel-4.1.1 application can *not* be applied independently
       of other applications on an arbitrary OTP 18 installation.

       On a full OTP 18 installation, also the following runtime
       dependencies have to be satisfied:
       -- sasl-2.6 (first satisfied in OTP 18.1)
       -- stdlib-2.6 (first satisfied in OTP 18.1)


 --- Fixed Bugs and Malfunctions ---

  OTP-12836    Application(s): kernel

               Host name lookups though inet_res, the Erlang DNS
               resolver, are now done case insensitively according to
               RFC 4343. Patch by Holger Weiß.


  OTP-13040    Application(s): kernel

               IPv6 distribution handler has been updated to share
               code with IPv4 so that all features are supported in
               IPv6 as well. A bug when using an IPv4 address as
               hostname has been fixed.


  OTP-13083    Application(s): kernel

               Caching of host names in the internal DNS resolver
               inet_res has been made character case insensitive for
               host names according to RFC 4343.


  OTP-13155    Application(s): kernel
               Related Id(s): PR#646

               Cooked file mode buffering has been fixed so
               file:position/2 now works according to Posix on Posix
               systems i.e. when file:position/2 returns an error the
               file pointer is unaffected.

               The Windows system documentation, however, is unclear
               on this point so the documentation of file:position/2
               still does not promise anything.

               Cooked file mode file:pread/2,3 and file:pwrite/2,3
               have been corrected to honor character encoding like
               the combination of file:position/2 and file:read/2 or
               file:write/2 already does. This is probably not very
               useful since the character representation on the
               caller's side is latin1, period.


 --- Improvements and New Features ---

  OTP-12837    Application(s): kernel

               Add {line_delim, byte()} option to inet:setopts/2 and
               decode_packet/3


 Full runtime dependencies of kernel-4.1.1: erts-7.0, sasl-2.6,
 stdlib-2.6


 ---------------------------------------------------------------------
 --- observer-2.1.1 --------------------------------------------------
 ---------------------------------------------------------------------

 The observer-2.1.1 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13030    Application(s): observer

               Show ets owner pid in crashdump viewers popup window,
               thanks Leo Liu.


  OTP-13044    Application(s): observer

               Several initialisms (eg, ERTS, ETS, SMP) are used as
               headings. They were being capitalized incorrectly.


  OTP-13163    Application(s): observer

               Fixed a crash in crashdump viewer when dump contained a
               truncated binary.


 Full runtime dependencies of observer-2.1.1: erts-7.0, et-1.5,
 inets-5.10, kernel-3.0, runtime_tools-1.8.14, stdlib-2.0, wx-1.2


 ---------------------------------------------------------------------
 --- parsetools-2.1.1 ------------------------------------------------
 ---------------------------------------------------------------------

 The parsetools-2.1.1 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13031    Application(s): parsetools

               Correct the documentation of the error tuple returned
               by Yecc and Leex.


 Full runtime dependencies of parsetools-2.1.1: erts-6.0, kernel-3.0,
 stdlib-2.5


 ---------------------------------------------------------------------
 --- public_key-1.1 --------------------------------------------------
 ---------------------------------------------------------------------

 The public_key-1.1 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Improvements and New Features ---

  OTP-12936    Application(s): public_key, ssh

               The 'ecdsa-sha2-nistp256', 'ecdsa-sha2-nistp384' and
               'ecdsa-sha2-nistp521' signature algorithms for ssh are
               implemented. See RFC 5656.


  OTP-13054    Application(s): public_key, ssh
               Related Id(s): OTP-13052

               There is now a file (public_key/priv/moduli) which
               lists size-generator-modulus triples. The purpose is to
               give servers the possibility to select the crypto
               primes randomly among a list of pregenerated triples.
               This reduces the risk for some attacks on
               diffie-hellman negotiation.

               See the reference manual for public_key:dh_gex_group/4
               where the handling of this is described.

               The ssh server (ssh:daemon) uses this.


  OTP-13132    Application(s): public_key

               Add different upper bounds for diffrent string types as
               suggested by comment in PKIX1Explicit88.


 Full runtime dependencies of public_key-1.1: asn1-3.0, crypto-3.3,
 erts-6.0, kernel-3.0, stdlib-2.0


 ---------------------------------------------------------------------
 --- runtime_tools-1.9.2 ---------------------------------------------
 ---------------------------------------------------------------------

 The runtime_tools-1.9.2 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Improvements and New Features ---

  OTP-13078    Application(s): runtime_tools

               Clarified dbg:stop documentation


 Full runtime dependencies of runtime_tools-1.9.2: erts-7.0,
 kernel-3.0, mnesia-4.12, stdlib-2.0


 ---------------------------------------------------------------------
 --- sasl-2.6.1 ------------------------------------------------------
 ---------------------------------------------------------------------

 Note! The sasl-2.6.1 application can *not* be applied independently
       of other applications on an arbitrary OTP 18 installation.

       On a full OTP 18 installation, also the following runtime
       dependencies have to be satisfied:
       -- kernel-4.1 (first satisfied in OTP 18.1)
       -- stdlib-2.6 (first satisfied in OTP 18.1)


 --- Improvements and New Features ---

  OTP-13000    Application(s): sasl

               Documentation improvements


 Full runtime dependencies of sasl-2.6.1: erts-6.0, kernel-4.1,
 stdlib-2.6, tools-2.6.14


 ---------------------------------------------------------------------
 --- snmp-5.2.1 ------------------------------------------------------
 ---------------------------------------------------------------------

 The snmp-5.2.1 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13017    Application(s): crypto, erts, eunit, snmp

               Small documentation fixes


 --- Improvements and New Features ---

  OTP-13101    Application(s): snmp

               Update configuration check of imask ( list of ones and
               zeros) to allow the empty list.


 Full runtime dependencies of snmp-5.2.1: crypto-3.3, erts-6.0,
 kernel-3.0, mnesia-4.12, runtime_tools-1.8.14, stdlib-2.5


 ---------------------------------------------------------------------
 --- ssh-4.2 ---------------------------------------------------------
 ---------------------------------------------------------------------

 The ssh-4.2 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-12699    Application(s): ssh
               Related Id(s): OTP-11688

               Better error handling in ssh_file. There was some rare
               errors when a NFS-mounted file was opened by ssh_file
               and then remotely deleted during reading. That caused
               an endless loop.

               That bug is now fixed.


  OTP-12759    Application(s): ssh

               Fixed a bug in the compression algorithm
               [email protected].


  OTP-12966    Application(s): ssh
               Related Id(s): seq12945

               It is now possible to start more than one daemon with a
               file descriptor given in option fd. Each daemon must of
               course have a unique file descriptor.


  OTP-13029    Application(s): ssh

               Fixed a bug that caused the option dh_gex_limit to be
               ignored.


  OTP-13158    Application(s): ssh

               A problem is fixed with the ssh:connect option
               pref_public_key_algs specifying user keys.


 --- Improvements and New Features ---

  OTP-12003    Application(s): ssh

               Document updates in the ssh reference manual: app doc
               file and ssh_connection.


  OTP-12787    Application(s): ssh

               The authorization phase is made stateful to prevent ssh
               acting on messages sent in wrong order.


  OTP-12792    Application(s): ssh
               Related Id(s): #5214, 6166, Codenomicon

               Testcases for bad message lengths and for bad subfield
               lengths added.


  OTP-12936    Application(s): public_key, ssh

               The 'ecdsa-sha2-nistp256', 'ecdsa-sha2-nistp384' and
               'ecdsa-sha2-nistp521' signature algorithms for ssh are
               implemented. See RFC 5656.


  OTP-12939    Application(s): ssh

               The crypto algorithms 'aes192-ctr' and 'aes256-ctr' are
               implemented. See RFC 4344.


  OTP-13018    Application(s): ssh

               The ciphers and macs AEAD_AES_128_GCM and
               AEAD_AES_256_GCM are implemented but not enabled per
               default. See the SSH App Reference Manual and RFC5647
               for details.

               The ciphers [email protected] and
               [email protected] are also implemented and
               available in the default configuration.


  OTP-13052    Application(s): ssh
               Related Id(s): OTP-13054

               The ssh:daemon option dh_gex_groups is extended to read
               a user provided ssh moduli file with generator-modulus
               pairs. The file is in openssh format.


  OTP-13054    Application(s): public_key, ssh
               Related Id(s): OTP-13052

               There is now a file (public_key/priv/moduli) which
               lists size-generator-modulus triples. The purpose is to
               give servers the possibility to select the crypto
               primes randomly among a list of pregenerated triples.
               This reduces the risk for some attacks on
               diffie-hellman negotiation.

               See the reference manual for public_key:dh_gex_group/4
               where the handling of this is described.

               The ssh server (ssh:daemon) uses this.


  OTP-13055    Application(s): ssh
               Related Id(s): OTP-13053

               The ssh:daemon option pwdfun now also takes a fun/4.
               This enables the user to 1) check userid-password in
               another way than the builtin algorithm, 2) implement
               rate limiting per user or source IP or IP+Port, and 3)
               implement blocking of missbehaving peers.

               The old fun/2 still works as previously.


  OTP-13066    Application(s): ssh

               There is now a new option to make the server limit the
               size range of moduli available for the diffie-hellman
               group exchange negotiation. See option
               {dh_gex_limits,{Min,Max}} in ssh:daemon/3.


  OTP-13067    Application(s): ssh

               Ecdh key exchange now validates compressed and
               uncompressed keys as defined in rfc5656


  OTP-13109    Application(s): ssh

               Search order for the .ssh directory are changed so
               $HOME is tried before init:get_argument(home).


  OTP-13130    Application(s): ssh

               The sftp receive window handling is optimized so it
               will not update the remote end too often. This makes
               "sftp mget" considerable faster.


  OTP-13156    Application(s): ssh

               The option key_cb is extended to take an optional list
               that is passed to the callback module as an option.
               With this it is possible to have different keys
               depending on which host that is connected. Another
               possibility is to write a callback module that fetches
               keys etc from a database.

               Thanks to Vipin Nair.


 Full runtime dependencies of ssh-4.2: crypto-3.3, erts-6.0,
 kernel-3.0, public_key-0.22, stdlib-2.3


 ---------------------------------------------------------------------
 --- ssl-7.2 ---------------------------------------------------------
 ---------------------------------------------------------------------

 The ssl-7.2 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-12838    Application(s): ssl

               Honor distribution port range options


  OTP-13134    Application(s): ssl

               Correct supervisor specification in TLS distribution.


  OTP-13141    Application(s): ssl

               Correct cache timeout


  OTP-13144    Application(s): ssl

               Avoid crash and restart of ssl process when key file
               does not exist.


  OTP-13166    Application(s): ssl

               Enable passing of raw socket options on the format
               {raw,_,_,_} to the underlying socket.


  OTP-13189    Application(s): ssl

               Hibernation with small or a zero timeout will now work
               as expected


 --- Improvements and New Features ---

  OTP-12392    Application(s): ssl

               *** HIGHLIGHT ***

               Add upper limit for session cache, configurable on ssl
               application level.

               If upper limit is reached, invalidate the current cache
               entries, e.i the session lifetime is the max time a
               session will be keept, but it may be invalidated
               earlier if the max limit for the table is reached. This
               will keep the ssl manager process well behaved, not
               exhusting memeory. Invalidating the entries will
               incrementally empty the cache to make room for fresh
               sessions entries.


  OTP-12457    Application(s): ssl

               Use new time functions to measure passed time.


  OTP-13142    Application(s): ssl

               Improved error handling in TLS distribution


  OTP-13143    Application(s): ssl

               Distribution over TLS now honors the nodelay
               distribution flag


 Full runtime dependencies of ssl-7.2: crypto-3.3, erts-7.0,
 inets-5.10.7, kernel-3.0, public_key-1.0, stdlib-2.0


 ---------------------------------------------------------------------
 --- stdlib-2.7 ------------------------------------------------------
 ---------------------------------------------------------------------

 Note! The stdlib-2.7 application can *not* be applied independently
       of other applications on an arbitrary OTP 18 installation.

       On a full OTP 18 installation, also the following runtime
       dependencies have to be satisfied:
       -- kernel-4.1 (first satisfied in OTP 18.1)
       -- sasl-2.6 (first satisfied in OTP 18.1)


 --- Fixed Bugs and Malfunctions ---

  OTP-13084    Application(s): stdlib

               The Erlang Pretty Printer uses :: for function type
               constraints.

               A bug concerning pretty printing of annotated type
               union elements in map pair types has been fixed.

               Some minor issues regarding the documentation of types
               and specs have been corrected.


  OTP-13145    Application(s): stdlib

               The shell command rp prints strings as lists of
               integers if pretty printing of lists is set to false.


  OTP-13157    Application(s): stdlib

               The shell would crash if a bit syntax expression with
               conflicting types were given (e.g. if a field type was
               given as 'integer-binary'). (Thanks to Aleksei Magusev
               for reporting this bug.)


  OTP-13162    Application(s): stdlib

               The rand:export_seed/0 would never return 'undefined'
               even if no seed has previously been created. Fixed to
               return 'undefined' if there is no seed in the process
               dictionary.


 --- Improvements and New Features ---

  OTP-13032    Application(s): stdlib

               Add support for the Delete, Home and End keys in the
               Erlang shell.


  OTP-13063    Application(s): stdlib

               beam_lib:all_chunks/1 and beam_lib:build_module/1 have
               been documented.


 Full runtime dependencies of stdlib-2.7: compiler-5.0, crypto-3.3,
 erts-7.0, kernel-4.1, sasl-2.6


 ---------------------------------------------------------------------
 --- test_server-3.9.1 -----------------------------------------------
 ---------------------------------------------------------------------

 The test_server-3.9.1 application can be applied independently of
 other applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13015    Application(s): test_server

               When generating Makefile from Makefile.src,
               ts_lib:get_arg/4 earlier removed all spaces in the
               extracted argument. The code was probably meant for
               removing leading and trailing spaces only, and is now
               corrected to do so.


  OTP-13181    Application(s): common_test, test_server

               With the Common Test 'create_priv_dir' start option set
               to 'auto_per_tc', the name of the priv directory for a
               configuration function could clash with the name of the
               priv directory for a test case, which would cause Test
               Server failure. This error has been corrected.


 Full runtime dependencies of test_server-3.9.1: erts-7.0, inets-6.0,
 kernel-4.0, observer-2.1, runtime_tools-1.8.16, stdlib-2.5,
 syntax_tools-1.7, tools-2.8


 ---------------------------------------------------------------------
 --- tools-2.8.2 -----------------------------------------------------
 ---------------------------------------------------------------------

 The tools-2.8.2 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13042    Application(s): tools

               The emacs mode does not add a newline after the arrow
               on -callback lines anymore.


 Full runtime dependencies of tools-2.8.2: compiler-5.0, erts-7.0,
 inets-5.10, kernel-3.0, runtime_tools-1.8.14, stdlib-2.5,
 webtool-0.8.10


 ---------------------------------------------------------------------
 --- typer-0.9.10 ----------------------------------------------------
 ---------------------------------------------------------------------

 The typer-0.9.10 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13010    Application(s): typer

               Fix a bug that could result in a crash when printing
               warnings onto standard error.


 Full runtime dependencies of typer-0.9.10: compiler-5.0,
 dialyzer-2.7, erts-6.0, hipe-3.10.3, kernel-3.0, stdlib-2.0


 ---------------------------------------------------------------------
 --- wx-1.6 ----------------------------------------------------------
 ---------------------------------------------------------------------

 The wx-1.6 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Improvements and New Features ---

  OTP-13160    Application(s): wx

               Add wxOverlay and make wxPostScripDC optional to make
               it easier to build on windows.

               Correct some function specifications.

               The driver implementation have been optimized and now
               invokes commands after events have been sent to erlang.


 Full runtime dependencies of wx-1.6: erts-6.0, kernel-3.0, stdlib-2.0


 ---------------------------------------------------------------------
 --- xmerl-1.3.9 -----------------------------------------------------
 ---------------------------------------------------------------------

 The xmerl-1.3.9 application can be applied independently of other
 applications on a full OTP 18 installation.

 --- Fixed Bugs and Malfunctions ---

  OTP-13070    Application(s): xmerl

               Removed the built-in definitions of xml.xsd from the
               xmerl_xsd module.


 Full runtime dependencies of xmerl-1.3.9: erts-6.0, kernel-3.0,
 stdlib-2.5


 ---------------------------------------------------------------------
 --- Thanks to -------------------------------------------------------
 ---------------------------------------------------------------------

 Andrey Mayorov, Ben Tyler, Constantin Rack, Danil Zagoskin, David
 Whitlock, Derek Brown, Eric Appelt, Gary Coulbourne,
 Holger Weiß, Ian Denhardt, Johannes Weißl, Josh Adams, Kirill
 Zaborsky, Kirilll Zaborsky, Kostis Sagonas, Loïc Hoguin, Luca
 Favatella, Luis Rascao, Magnus Henoch, Magnus Lång, Magnus
 Ottenklinger, Mikael Pettersson, Nico Kruber, Pawel Pikula, Pierre
 Fenoll, Péter Gömöri, Riccardo, Rich Morin, Roger Lipscombe, Rory
 Byrne, Serge Aleynikov, Sergey Savenko, Steven Danna, Tobias
 Schlager, Tom Briden, Tom Szilagyi, Tuncer Ayaz, Vipin Nair, Vlad
 Dumitrescu, soranoba, xsipewe


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