Fix testcase indentation
Remove etop gui

Use observer for the gui part
Remove gs parts
Remove gs parts of the debugger
Fix reverting of implicit funs

Implicit funs parts in plain AST are no longer in concrete form since
Erlang/OTP R15.
Fix transformation of implicit funs in igor

Function erl_syntax_lib:analyze_implicit_fun/1 should not be called on
implicit external funs, as their parts can contain variables instead of
atoms and integers.
Remove a useless function clause in erl_syntax_lib
Clean up address family handling towards Erlang
Merge branch 'sverk/valgrind-added-leak-check' into maint

* sverk/valgrind-added-leak-check:
  erts: Prevent valgrind from repeating same memory leaks reports
Merge branch 'maint'
add erl-xcom-arm-linux.conf
Merge branch 'henrik/xcomp-arm' into maint
Merge branch 'maint'
fix documentation
Fix confusing documentation about error handlers in SASL

The SASL documentation confusingly talks about a handler 'error_logger_mf_h'
which doesn't actually exist. The handler is named 'log_mf_h', and it and
all other error handlers used by SASL are part of stdlib, not SASL itself.
This patch makes the documentation clearer.
[inets/httpd] Fixed mod_head handling of "new" response
[inets/httpd] Logging cleanup

Remove logging when fo keep-alive connection timeout. This is
a normal event (feature) not an error.
[inets/httpd] Improved access log entry

Sometimes the size of a response could be as a string.
[inets/httpd] Improved request handler terminate error-log entry

If a request handler terminates abnormally (terminate reason not
normal), the error-log entry was a bit obtuse ("Internal Server Error").
This has been improved so that the log entry now also include the
actual terminate reason.
erl_docgen: fix code highlighting and warning and note parts in erl_docgen