Merged revisions 261867 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

........
  r261867 | lmadsen | 2010-05-07 11:05:24 -0500 (Fri, 07 May 2010) | 6 lines
  
  Update UPGRADE-1.6.txt stating insecure=very has been removed.
  
  (closes issue #17282)
  Reported by: stuarth
  Tested by: stuarth
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@261868 65c4cc65-6c06-0410-ace0-fbb531ad65f3

UPGRADE-1.6.txt

@@ -209,6 +209,12 @@ Channel Drivers:
   The "username" setting still work, but is deprecated and will not work in 
   the next version of Asterisk.
 
+* SIP: The old "insecure" options, deprecated in 1.4, have been removed.
+  "insecure=very" should be changed to "insecure=port,invite"
+  "insecure=yes" should be changed to "insecure=port"
+  Be aware that some telephony providers show the invalid syntax in their
+  sample configurations.
+
 * chan_local.c: the comma delimiter inside the channel name has been changed to a
   semicolon, in order to make the Local channel driver compatible with the comma
   delimiter change in applications.