FS-4994 --resolve

src/mod/endpoints/mod_sofia/sofia.c

@@ -8534,7 +8534,7 @@ void sofia_handle_sip_i_invite(switch_core_session_t *session, nua_t *nua, sofia
 				switch_channel_set_variable(channel, "push_channel_name", "true");
 			} else if (!strcasecmp(un->un_name, "X-FS-Support")) {
 				tech_pvt->x_freeswitch_support_remote = switch_core_session_strdup(session, un->un_value);
-			} else if (!strncasecmp(un->un_name, "X-", 2) || !strncasecmp(un->un_name, "P-", 2)) {
+			} else if (!strncasecmp(un->un_name, "X-", 2) || !strncasecmp(un->un_name, "P-", 2) || !strcasecmp(un->un_name, "User-to-User")) {
 				if (!zstr(un->un_value)) {
 					char new_name[512] = "";
 					int reps = 0;