Merge branch '4.4' into 5.1

* 4.4:
  Enable "native_constant_invocation" CS rule
  Make AbstractPhpFileCacheWarmer public

Author: nicolas-grekas

DependencyInjection/AbstractDoctrineExtension.php

@@ -242,11 +242,11 @@ protected function detectMetadataDriver(string $dir, ContainerBuilder $container
         $configPath = $this->getMappingResourceConfigDirectory();
         $extension = $this->getMappingResourceExtension();
 
-        if (glob($dir.'/'.$configPath.'/*.'.$extension.'.xml', GLOB_NOSORT)) {
+        if (glob($dir.'/'.$configPath.'/*.'.$extension.'.xml', \GLOB_NOSORT)) {
             $driver = 'xml';
-        } elseif (glob($dir.'/'.$configPath.'/*.'.$extension.'.yml', GLOB_NOSORT)) {
+        } elseif (glob($dir.'/'.$configPath.'/*.'.$extension.'.yml', \GLOB_NOSORT)) {
             $driver = 'yml';
-        } elseif (glob($dir.'/'.$configPath.'/*.'.$extension.'.php', GLOB_NOSORT)) {
+        } elseif (glob($dir.'/'.$configPath.'/*.'.$extension.'.php', \GLOB_NOSORT)) {
             $driver = 'php';
         } else {
             // add the closest existing directory as a resource