Allow Name/Arity syntax in maps inside attributes

Currently Name/Arity syntax is supported in list and tuple terms. This change makes it possible to use this syntax in map terms for consistency and convenience.

Example:
-custom(#{test1 => init/2, test2 => [val/1, val/2]}).
Fix typo in erlang-mode comment
Add configure option --with-ssl-incl=PATH

to be used together with --with-ssl=PATH if the include directory
is in another location.
Correct SSL_RUNTIME_LIBDIR when erl_xcomp_sysroot ends with a /
erts: Add gdb command etp-address-to-beam-opcode
Fix stdlib.appup for OTP-17.4

This is to allow upgrade from stdlib-2.2 (OTP-17.3).
stdlib: Handle key type expressions
Fix dialyzer warnings for unmatched return in gen_event

This was introduced by PR 445, commit
2e78c5f3e7f9991484ceb5d56e5b0086331101be.
stdlib: Refactor Maps farity attributes
stdlib: Refactor ?line in erl_pp_SUITE:misc_attrs
stdlib: erl_parse abstract Maps
stdlib: Test Map attributes via erl_pp
Merge branch 'siri/new-dialyzer-gen_event/OTP-12206' into maint

* siri/new-dialyzer-gen_event/OTP-12206:
  Fix dialyzer warnings for unmatched return in gen_event
Merge branch 'egil/fix-erl_pp/OTP-12190' into maint

* egil/fix-erl_pp/OTP-12190:
  stdlib: Handle key type expressions
Merge branch 'ap/attribute_fun_arity_in_map/OTP-12213' into maint

* ap/attribute_fun_arity_in_map/OTP-12213:
  stdlib: Test Map attributes via erl_pp
  stdlib: erl_parse abstract Maps
  stdlib: Refactor ?line in erl_pp_SUITE:misc_attrs
  stdlib: Refactor Maps farity attributes
  Allow Name/Arity syntax in maps inside attributes
Merge branch 'goofansu/fix-gen-event-comment' into maint

OTP-12214

* goofansu/fix-gen-event-comment:
  Fix typo in erlang-mode comment
Merge branch 'siri/appups-17.4' into maint

* siri/appups-17.4:
  Fix stdlib.appup for OTP-17.4
Merge branch 'sverk/with-ssl-incl' into maint

* sverk/with-ssl-incl:
  Correct SSL_RUNTIME_LIBDIR when erl_xcomp_sysroot ends with a /
  Add configure option --with-ssl-incl=PATH

OTP-12215
OTP-12216
Merge branch 'sverk/etp-address-to-beam-opcode' into maint

* sverk/etp-address-to-beam-opcode:
  erts: Add gdb command etp-address-to-beam-opcode