Document the new automatic 'ignoresdpversion' behavior.

Asterisk will now automatically ignore incorrect incoming SDP version numbers
when necessary to complete a T.38 re-INVITE operation.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@200726 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -27,6 +27,12 @@ SIP Changes
    'rpid' and 'pai'. Setting sendrpid to 'rpid' will cause Remote-Party-ID
    header to be sent (equivalent to setting sendrpid=yes) and setting
    sendrpid to 'pai' will cause P-Asserted-Identity header to be sent.
+ * The 'ignoresdpversion' behavior has been made automatic when the SDP received
+   is in response to a T.38 re-INVITE that Asterisk initiated. In this situation,
+   since the call will fail if Asterisk does not process the incoming SDP, Asterisk
+   will accept the SDP even if the SDP version number is not properly incremented,
+   but will generate a warning in the log indicating that the SIP peer that sent
+   the SDP should have the 'ignoresdpversion' option set.
 
 Applications
 ------------