add sip_refer_to_params

src/mod/endpoints/mod_sofia/sofia.c

@@ -7209,6 +7209,10 @@ void sofia_handle_sip_i_refer(nua_t *nua, sofia_profile_t *profile, nua_handle_t
 			exten = (char *) refer_to->r_url->url_user;
 		}
 
+		if (refer_to->r_url->url_params) {
+			switch_channel_set_variable(tech_pvt->channel, "sip_refer_to_params", refer_to->r_url->url_params);
+		}
+
 		switch_core_session_queue_indication(session, SWITCH_MESSAGE_REFER_EVENT);
 		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Process REFER to [%s@%s]\n", exten, (char *) refer_to->r_url->url_host);