Reset peer outboundproxy on sip.conf reload

If you set a peer's outboundproxy and then removed it from the config,
this would not get picked up in a config reload.  This patch fixes that
by resetting it in set_peer_defaults().

Closes ASTERISK-19454
Review: https://reviewboard.asterisk.org/r/3065/


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@403634 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -27990,6 +27990,10 @@ static void set_peer_defaults(struct sip_peer *peer)
 	peer->disallowed_methods = sip_cfg.disallowed_methods;
 	peer->transports = default_transports;
 	peer->default_outbound_transport = default_primary_transport;
+	if (peer->outboundproxy) {
+		ao2_ref(peer->outboundproxy, -1);
+		peer->outboundproxy = NULL;
+	}
 }
 
 /*! \brief Create temporary peer (used in autocreatepeer mode) */