Merged revisions 290648 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r290648 | dvossel | 2010-10-06 16:08:19 -0500 (Wed, 06 Oct 2010) | 12 lines
  
  Fixes gtalk outbound DTMF to work properly.
  
  Outbound DTMF with gtalk needs to be done within the RTP stream.  I discovered
  this after investigating a packet capture from the gmail client.  Instead of
  performing jingle signaling DTMF, the gtalk servers expect all DTMF to arrive
  on the RTP stream using RFC2833 way of doing things.  Chan_gtalk also had an issue
  with negotiating RTP payload type 106 for the telephony-event and then sending
  DTMF as payload 101.  This has been resolved by always negotiating 101 as the payload
  type like we do everywhere else.  With this patch, incoming google voice calls forwarded
  to Asterisk via gtalk work.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@290649 65c4cc65-6c06-0410-ace0-fbb531ad65f3