Log room hints

php/utils/servers-rooms.php

@@ -501,6 +501,7 @@
 			// Check reachability before polling too much.
 			if (count($this->room_hints) >= 2) {
 				log_info("Checking reachability for $base_url first...");
+				log_value($this->room_hints);
 				if (!url_is_reachable($base_url)) {
 					log_warning("Reachability test failed by $base_url.");
 					return [];