chore(snowflake): add more randomness in server id fallback

Signed-off-by: Benjamin Gaussorgues <benjamin.gaussorgues@nextcloud.com>

Author: Altahrim

lib/private/Snowflake/SnowflakeGenerator.php

@@ -107,9 +107,10 @@ private function getCurrentTime(): array {
 	 */
 	private function getServerId(): int {
 		$serverid = $this->config->getSystemValueInt('serverid', -1);
+
 		return $serverid > 0
 			? $serverid
-			: crc32(gethostname() ?: random_bytes(8));
+			: hexdec(hash('xxh32', gethostname() ?: random_bytes(8)));
 	}
 
 	private function isCli(): bool {