Add missing 'useragent' field to sip-friends.sql file.

(closes issue #17171)
Reported by: thehar
Patches: 
      sip-friends.patch uploaded by thehar (license 831)
Tested by: pabelanger, thehar

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@258106 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/scripts/sip-friends.sql

@@ -49,6 +49,7 @@ CREATE TABLE `sipfriends` (
   `rtpkeepalive` varchar(15),
   `lastms` int(11) NOT NULL default '-1',
   `setvar` varchar(200),
+  `useragent` varchar(50),
   PRIMARY KEY  (`name`),
   INDEX host (host, port),
   INDEX ipaddr (ipaddr, port)