I've fix some memory leak in your patch.  Be careful to free the value from the find output of a hash after you used it.

FS-3758 --resolve ok so I wrote my own patch but i did borrow the 2 lines of code to create a seq from the original patch! sofia changes probably need to be converted to a tag if they are to go upstream.  This completely manages sub/pub from inside mod_sofia inside the db and subs can now persist and/or fail over mid dialog tested on several things like polycom/snom/yealink on SLA and presence

Please Test !

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