Conflicts:
	libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn_stack_rcv.c
	libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn_support.c

FS-3768 Mutex lock missing.  I would personally removed that lock since all the sql call does lock it now.  But maybe it required that no other request be done in the mean time.

add sofia global standby on that makes sofia not do anything but refuse to work until sofia global standby off or sofia recover is issued

I've had to add a missing include and do some formating cleanup.

NOTE: This patch might affect xml_cdr, so better check if the output is to your liking after this commit

Please Windows user test this one out.

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