* nybek/fix_supervisor_get_childspec:
  Fix supervisor:get_childspec/2 for simple_one_for_one

OTP-12841

* ia/inets/deprecate:
  inets: Fix race condition in httpc
  inets: Remove use of httpd_conf:clean/1 and httpd_conf:custom_clean/3
  inets: Remove use of httpd_conf:make_integer/1
  inets: Deprecate functions in util module httpd_conf.erl

These functions should not be used, there exists better
functions in the standard libraries.

* sverk/ets-file2tab-preserve-opts/OTP-12814:
  stdlib: Make ets:file2tab preserve read/write_concurrency
  stdlib: Fix ets_SUITE:tabfile_ext4

In OTP 17 it is possible to mix types such as dict:dict() and
dict:dict(_, _) outside of the dict module (and similarly for some
other opaque types in STDLIB), but the results are unfortunately
possibly invalid warnings in users' code. In OTP 18 parameterized
opaque types with the same name but with different number of
parameters are no longer compatible when seen from outside of the
module where the types are declared.

The types in STDLIB have been updated accordingly; for instance
  -opaque dict() :: dict(_, _).
has been replaced by
  -type dict() :: dict(_, _).

Add new functions erl_parse:type_inop_prec() and
erl_parse:type_preop_prec().

Get rid of paren_type used for parentheses in types.

A bug in supervisor:get_childspec/2 results in
{error, simple_one_for_one} being returned on every call when the
supervisor strategy is simple_one_for_one.

This commit includes a small refactoring which brings together the
two 'start_child' clauses to make the code easier to follow.