ftmod_libpri: go to PROGRESS_MEDIA in on_ringing() if there is inband information available and rework channel opening to not skip state changes when the channel is already open.

The latter part affects on_ringing(), on_progress() and on_proceeding().

Somewhat experimental and untested (apart from a compile run).
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

Bugfix: FreeSWITCH::Client::sendmsg was returning the first FSES packet it received, which caused a race condition when an event was in transit; now it waits for Content-Type: command/reply

alter implementation of renegotiate codec on hold feature to still take other sdp elements into consideration

FS-3127 --comment-only can you try this patch first to see if it fixes it without any changes to mod_cc

FS-640 --comment-only can you see if this patch helps, I think it should really be fixed in sofia but this shold keep it at bay

Using ftdm_log_chan() in ftdm_analog_configure_span() is a bad idea,
since the span won't have any channels assigned.

This bug powered by declaring all variables at the top of the function,
even if they are used in an if branch at the end.

A C99'ish:

	if (callwaiting) {
		for (unsigned int i = 1; i <= span->span->chan_count; i++) {
			/* ... */
		}
	}

would have alerted the developer adding the log statement.
But since we can't have nice things (thanks MSVC for not supporting C99!)
</rant>
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

This partially reverts commit 17d52112.

Some changes in that commit caused 393 files which are in the tree to
be mistakenly ignored.