mod_callcenter: Make callcenter_config agent get return the value of the item requested.  Also added queue param max-wait-time-with-no-agent-time-reached: If the max-wai-time-with-no-agent is already reached for the queue, then new caller can wait for x ammount of second before it kicked out of the queue rather than get rejected automaticly.

add -ncwait for Unix based implememtations to make the backgrounder wait to make sure the process starts before detaching

fix race in codec failure condition, then fix bug in sdp parsing (likely a regression from recent codec changes) to never have the problem in the first place so you are double-protected

skypopen: manage ERROR 36 Not online, cosmetics, put the interface DOWN when no session and when beginning to destroy