inets: httpc improve pipelining
Add test for httpd config option 'script_timeout'

The option got ignored before 720721e.
inets: added testcase for keep_alive_timeout
httpc: Enhanched error handling
httpc: Allow content body in DELETE requests
Fix {stream, {self, once}} in httpc

Previously the only difference between {stream, self} and {stream,
{self, once}} was an extra Pid in the stream_start message due to a
bug in httpc_handler. It was immediately sending a bunch of messages
till the end instead of waiting for httpc:stream_next/1 being called.
Remove http_chunk:decode/4 as it is no longer used

http_chunk:decode/4, the side-effecting chunk decoder, was only used
by httpc_handler:handle_http_body/2 but now it's completely unused.

Conflicts:

	lib/inets/src/http_client/httpc_handler.erl
inets: httpc make httpc_cancel_request/[1,2] asynchronous

Conflicts:

	lib/inets/src/http_client/httpc_handler.erl
inets: httpc - Remove dead error handling code

Some error handling is only relevant for functions that
end up in gen_server:call and not in gen_server:cast.
[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.
[eldap, inets]: fix testcases when ssl not is present

Conflicts:

	lib/eldap/test/eldap_basic_SUITE.erl
ftp: Implement ftps (upgrade to TLS)
ftp: Implement ftps (upgrade to TLS)
ftp: old ftp_SUITE re-written and works
ftp: towards a working ftps, chapter 1
added some printouts
.