Change Debug Comment about Auto Detect NAT

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5077 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fixed Comment

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5078 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix transfer_on_hangup (only complete transgfer for established/ringing transferer channels) (Thank Matt for the pointer)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5079 43c1dc8c-776e-4df2-8ef1-6e829299be21