Lift 'after' blocks to zeroary functions

If 'after' blocks are not lifted, the ids of functions in their bodies
must be killed and it can make stacktraces more confusing than they
should. We lift them to zeroary functions to avoid unnecessary killings
and duplication of code.
erts: Remove unused constant DRIVER_TAB_SIZE
Fix httpd config option 'keep_alive_timeout'

The documentation states that the value is in seconds, which was true
when using the Apache like configuration file, but not true when using
the proplist style configuration.
Fix httpd config option 'script_timeout'

This fixes the usage of the httpd configuration option 'script_timeout',
which got ignored before.

The documentation states that the value is in seconds, which was true
when using the Apache like configuration file, but not true when using
the proplist style configuration.
Fix syslog defines

config.h defines HAVE_SYSLOG_H whereas the sources are looking for
NO_SYSLOG to be undefined. As the logic of "if feature is available"
makes more sense than "if feature is not unavailable", I opted for the
config.h define.
Define LOG_ERR for systems without syslog.h
Remove ^L characters hidden randomly in the code. Not those used in text files as delimiters.

While working on a tool that processes Erlang code and testing it against this repo,
I found out about those little sneaky 0xff. I thought it may be of help to other
people build such tools to remove non-conforming-to-standard characters.
orber: Remove testing of old ssl
Add dict:is_empty/1 and orddict:is_empty/1

dict:size/1 runs in constant time, but orddict:size/1 does not.  With
this change, the two modules stay API compatible and gain a
constant-time function for checking whether a dictionary is empty.
inets: httpc improve pipelining
httpc: Enhanched error handling
inets: httpc make httpc_cancel_request/[1,2] asynchronous
erts: Fix loading of NIF library with unicode in path
The gen_event callback module expects terminate/2, not terminate/1
erts: Remove unit in 'Time left' printout

The unit 'ms' is removed due to ease of parsing.
erts: Remove space in 'Buckets' printout

Fix to ease parsing of information.
erts: Add the +sfwi system flag

+sfwi Interval
    Set scheduler forced wakeup interval. All run queues will be scanned
    each Interval milliseconds. While there are sleeping schedulers in
    the system, one scheduler will be woken for each non-empty run queue
    found. An Interval of zero disables this feature, which also is the
    default.

    This feature has been introduced as a temporary workaround for lengthy
    executing native code, and native code that do not bump reductions
    properly in OTP. When these bugs have be fixed the +sfwi flag will
    be removed.

Conflicts:

	erts/doc/src/erl.xml
	erts/etc/common/erlexec.c
erts: bumped version number
erts: reorganization of functions to r15b03 standards
Merge branch 'fredrik/sfwi-r15b03/OTP-11164' into maint-r15

* fredrik/sfwi-r15b03/OTP-11164:
  erts: reorganization of functions to r15b03 standards
  erts: bumped version number
  erts: Add the +sfwi system flag