don't refuse invites on established sessions due to session limits

src/mod/endpoints/mod_sofia/sofia.c

@@ -2061,21 +2061,24 @@ void sofia_event_callback(nua_event_t event,
 	case nua_i_notify:
 	case nua_i_info:
 
-		if (sess_count >= sess_max || !sofia_test_pflag(profile, PFLAG_RUNNING) || !switch_core_ready_inbound()) {
-			nua_respond(nh, 503, "Maximum Calls In Progress", SIPTAG_RETRY_AFTER_STR("300"), NUTAG_WITH_THIS(nua), TAG_END());
-			goto end;
-		}
+		if (!sofia_private) {
+			if (sess_count >= sess_max || !sofia_test_pflag(profile, PFLAG_RUNNING) || !switch_core_ready_inbound()) {
+				nua_respond(nh, 503, "Maximum Calls In Progress", SIPTAG_RETRY_AFTER_STR("300"), NUTAG_WITH_THIS(nua), TAG_END());
+				goto end;
+			}
 
 
-		if (switch_queue_size(mod_sofia_globals.msg_queue) > (unsigned int)critical) {
-			nua_respond(nh, 503, "System Busy", SIPTAG_RETRY_AFTER_STR("300"), NUTAG_WITH_THIS(nua), TAG_END());
-			goto end;
-		}
+			if (switch_queue_size(mod_sofia_globals.msg_queue) > (unsigned int)critical) {
+				nua_respond(nh, 503, "System Busy", SIPTAG_RETRY_AFTER_STR("300"), NUTAG_WITH_THIS(nua), TAG_END());
+				goto end;
+			}
 
-		if (sofia_test_pflag(profile, PFLAG_STANDBY)) {
-			nua_respond(nh, 503, "System Paused", NUTAG_WITH_THIS(nua), TAG_END());
-			goto end;
+			if (sofia_test_pflag(profile, PFLAG_STANDBY)) {
+				nua_respond(nh, 503, "System Paused", NUTAG_WITH_THIS(nua), TAG_END());
+				goto end;
+			}
 		}
+
 		break;
 
 	default: