Majorly updated app_rpt.c allowing linking of repeaters/remote bases using...

Majorly updated app_rpt.c allowing linking of repeaters/remote bases using (IAX2) and supporting remote base nodes as well (also added visual documentation in rpt_flow.pdf)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3252 65c4cc65-6c06-0410-ace0-fbb531ad65f3