Better dependancy and version checking method, solve call problems when...

Better dependancy and version checking method, solve call problems when dealing with a gatekeeper, sanity check call cleanup, in hopes to avoid deadlocks (Bugs #3848 #3643, #3591)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5383 65c4cc65-6c06-0410-ace0-fbb531ad65f3