Moves UPGRADE.txt notes from r357356 to a new section specific to 1.8.12

(issue ASTERISK-19352)
reported by: jamicque


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@357386 65c4cc65-6c06-0410-ace0-fbb531ad65f3

UPGRADE.txt

@@ -18,6 +18,11 @@
 ===
 ===========================================================
 
+From 1.8.11 to 1.8.12:
+
+* If no transport is specified in sip.conf, transport will default to UDP.
+  Also, if multiple transport= lines are used, only the last will be used.
+
 From 1.6.2 to 1.8:
 
 * When using TLS with Manager and the HTTP server, the desired port
@@ -172,9 +177,6 @@ From 1.6.2 to 1.8:
   are using the early media DTMF overlap dialing method you now need to set
   allowoverlap=dtmf.
 
-* If no transport is specified in sip.conf, transport will default to UDP.
-  Also, if multiple transport= lines are used, only the last will be used.
-
 From 1.6.1 to 1.6.2:
 
 * SIP no longer sends the 183 progress message for early media by