some additional debugging tools added at SIPit23:

- move all setting of 'needdestroy' on dialog structures into the history

- report all tags involved when a pedantic check fails on a REFER



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@149964 65c4cc65-6c06-0410-ace0-fbb531ad65f3