Treat Redis::isConnected as non-deterministic

Author: vrana

bin/functionMetadata_original.php

@@ -170,6 +170,9 @@
 	'DateTimeImmutable::getTimestamp' => ['hasSideEffects' => false],
 	'DateTimeImmutable::getTimezone' => ['hasSideEffects' => false],
 
+	// affected by connect()
+	'Redis::isConnected' => ['hasSideEffects' => true],
+
 	'SplDoublyLinkedList::pop' => ['hasSideEffects' => true],
 	'SplDoublyLinkedList::shift' => ['hasSideEffects' => true],