ims_reqistrar_scscf: Fix bug with multi-notifications

- Added more accurate contact comparison when
  sending NOTIFY to a subscriber.

(cherry picked from commit c275110)

src/modules/ims_registrar_scscf/registrar_notify.c

@@ -1351,6 +1351,21 @@ int aor_to_contact(str* aor, str* contact) {
     return ret;
 }
 
+/*!
+ * \brief Match two contacts with full string - ips, ports and aliases
+ * \param c1 contact string 1
+ * \param c2 contact string 2
+ * \return 1 when they match, 0 when they not match
+ */
+static int contact_match(str* c1, str* c2) {
+	LM_DBG("Matching full contact string - comparing [%.*s] and [%.*s]\n", c1->len, c1->s, c2->len, c2->s);
+	if ((c1->len == c2->len) && !memcmp(c1->s, c2->s, c1->len)) {
+		return 1;
+	}
+
+	return 0;
+}
+
 /*!
  * \brief Match a contact record to a contact string but only compare the ip port portion
  * \param ptr contact record
@@ -1438,7 +1453,7 @@ void create_notifications(udomain_t* _t, impurecord_t* r_passed, str *presentity
 
         //This is a fix to ensure that when a user subscribes a full reg info is only sent to that UE
         if (event_type == IMS_REGISTRAR_SUBSCRIBE) {
-            if (contact_port_ip_match(watcher_contact, &s->watcher_contact) &&
+            if (contact_match(watcher_contact, &s->watcher_contact) &&
                     (presentity_uri->len == s->presentity_uri.len) && (memcmp(s->presentity_uri.s, presentity_uri->s, presentity_uri->len) == 0)) {
                 LM_DBG("This is a fix to ensure that we only send full reg info XML to the UE that just subscribed.\n");
                 LM_DBG("About to make new notification! We always increment the local cseq and version before we send a new notification\n");