res_pjsip_messaging: IPv6 receive address needs brackets

When handling an incoming SIP MESSAGE, PJSIP
attaches the IP address that the message was
received from to the message in the variable
PJSIP_RECVADDR.  When the IP address is IPv6
the :PORT appended results in an unparseable
mess. By using an additional bit flag on the
pj_sockaddr_print call, the conventional use
of brackets around the address is achieved.

ASTERISK-27193 #close

Change-Id: I12342521f2ce87a5b6e4883d480a3fd957aa9fd9

res/res_pjsip_messaging.c

@@ -512,7 +512,7 @@ static enum pjsip_status_code rx_data_to_ast_msg(pjsip_rx_data *rdata, struct as
 	buf[size] = '\0';
 	res |= ast_msg_set_from(msg, "%s", buf);
 
-	field = pj_sockaddr_print(&rdata->pkt_info.src_addr, buf, sizeof(buf) - 1, 1);
+	field = pj_sockaddr_print(&rdata->pkt_info.src_addr, buf, sizeof(buf) - 1, 3);
 	res |= ast_msg_set_var(msg, "PJSIP_RECVADDR", field);
 
 	switch (rdata->tp_info.transport->key.type) {