mod_callcenter: Bring up to date the max-wait-time-with-no-agent and max-wait-time-with-no-agent-time-reached param.   I'll probably rename the param max-wait-time-with-no-agent-time-reached to something that actually make sense in the future

set rtp stack into optimal mode for transferring data during fax situations (that does not mean we support the idea of audio fax over ip......)

Make sure the received DTMF duration is initialsed at the beginning, and if the realtime calllback is set or altered during operation of the detector.

FS-3735 that is a resonable figure, if that works we can set it to this. can we close out this bounty then?