Merged revisions 320180 via svnmerge from

Merged revisions 320180 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r320180 | mnicholson | 2011-05-20 13:48:46 -0500 (Fri, 20 May 2011) | 16 lines

  This commit modifies the way polling is done on TLS sockets.

  Because of the buffering the TLS layer does, polling is unreliable. If poll is
  called while there is data waiting to be read in the TLS layer but not at the
  network layer, the messaging processing engine will not proceed until something
  else writes data to the socket, which may not occur. This change modifies the
  logic around TLS sockets to only poll after a failed read on a non-blocking
  socket. This way we know that there is no data waiting to be read from the
  buffering layer.

  (closes issue #19182)
  Reported by: st
  Patches:
        ssl-poll-fix3.diff uploaded by mnicholson (license 96)
  Tested by: mnicholson
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@320181 65c4cc65-6c06-0410-ace0-fbb531ad65f3