This bug was introduced by OTP-13388.

* siri/crashdump-dir/OTP-13388:
  Fix code_SUITE after test_server change
  Set default value for crash_dump_dir

* henrik/doc-fixes:
  Fix typo in INSTALL.md
  Update README.md
  Fix typo in 'app' documentation
  s/is/are

test_server:start_node does no longer add the test_server path to the
new node, since the needed code is present in the default path. This
caused two test cases in code_SUITE to fail.

code_SUITE:mult_lib_roots: Expected the test_server path to be first
in the code path. This check is removed.

code_SUITE:bad_erl_libs: Started a node with "-env ERL_LIBS ",
i.e. not giving any value to the ERL_LIBS variable. This test
succeeded by accident, since the combination with arguments set by
test_server_node.erl and by slave.erl caused the node start to work,
and no further checks were present in the test. This part of the test
case is now removed.

OTP-13251

* sverk/halt-INT_MIN:
  erts: Make erlang:halt() accept bignums as Status
  erts: Change erl_exit into erts_exit
  kernel: Remove calls to erl_exit

* msantos/epmd-IPv6-node-reg2/PR-864/OTP-13364:
  epmd: support IPv6 node registration

* siri/appups-18.3:
  Update appups in kernel, stdlib and sasl for OTP-18.3

Change scheduler responsiveness to 'check_schedulers'.