Change the minimum log level to fatal

Downstreaming of https://github.com/owncloud/core/pull/26213



Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

lib/private/Log.php

@@ -233,7 +233,7 @@ class Log implements ILogger {
 	 * @return void
 	 */
 	public function log($level, $message, array $context = array()) {
-		$minLevel = min($this->config->getValue('loglevel', Util::WARN), Util::ERROR);
+		$minLevel = min($this->config->getValue('loglevel', Util::WARN), Util::FATAL);
 		$logCondition = $this->config->getValue('log.condition', []);
 
 		array_walk($context, [$this->normalizer, 'format']);