fix: uninitialized output variable

php/servers/sources.php

@@ -98,6 +98,7 @@
 		private function sdir_process_tags(): bool {
 			$entry_missing_url = false;
 			$entry_missing_tags = false;
+			$entry_invalid_url = false;
 
 			$rooms = SDIRCommunitySource::get_sdir_entries();