* lukas/system/improve_profile_docs/OTP-14633:
  erts: Add term2bin note about encoding guarantee
  Fix broken link in INSTALL howto
  system: Add info to profiling effeciency guide
  Update message queue and pinfo binary docs
  kernel: Clarify gen_tcp:listen documentation
  system: Add External OSS tools section to profiling guilde

This commit also adds a check to see that all files that
are part of an xi:include also have part of XML_FILES
and vice versa. It also fixes any applications where this
was not true.

As of Erlang/OTP 20.0, the type of ETS tables, ets:tid(), is a
reference(). A request was put forward that the Erlang shell should be
able to handle references in its input.

This commit introduces an extended parser in module lib. It can parse
pids, ports, references, and external funs under the condition that
they can be created in the running system. The parser is meant to be
used internally in Erlang/OTP. The alternative, to extend erl_scan and
erl_parse, was deemed inferior as it would require the abstract format
be able to represent pids, ports, references, and funs, which would be
confusing as they are not expressions as such, but data types.

* egil/percept/remove-application/OTP-14163:
  ssl: Remove percept from benchmark
  otp: Don't mention percept in documentation
  runtime_tools: Remove percept
  percept: Remove application