Merged revisions 291192 via svnmerge from

Merged revisions 291192 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r291192 | dvossel | 2010-10-11 16:38:39 -0500 (Mon, 11 Oct 2010) | 19 lines

  Gtalk enhancements and general code cleanup.

  This patch includes several chan_gtalk enhancements.
  Two new gtalk.conf options have been added, externip
  and stunadd.  Setting externip allows us to
  manually specify what the external IP address is
  outside of a NAT environment.  Setting the stunaddr
  option to a valid stun server allows for that external
  ip to be retrieved via a STUN server automatically.  This
  external IP is then advertised during call setup as
  a possible candidate.

  I have also attempted to clean up chan_gtalk's code
  so it meets our coding guidelines. During this cleanup
  I noticed several things that need to be done in the
  code and made a TODO section at the top of the file.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@291193 65c4cc65-6c06-0410-ace0-fbb531ad65f3