mod_callcenter: Add better support when agent doesn't answer, including creating a new variable for the delay that is different than reject or busy.  Thanks to François Delawarde

mod_callcenter: >WARNING, some event value got removed< Adding new event time value that can then be used to calculate the Wait;Talk;Total duration of a member were on call.  CC-Wait-Time CC-Talk-Time and CC-Total-Time are no longer returned.  Visit the code or check the wiki for the updated variable.

mod_callcenter: Add new CLI cmd and change some to be more standard.  Patch from François Delawarde, thanks.

pass header in X-FS headers on attended transfer CID update to indicate specific situation to flip callee/caller id when targeting a 1 legged call

mod_callcenter: Fix a bug when an caller leave the queue from a BREAK Call (Transfer...), it doesn't think an agent answered.

send another presence event on calls that were cancelled from LOSE_RACE to fix winnable race in Broadsoft SCA

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