[DI] Add "psr4" service attribute for PSR4-based discovery and registration

Author: nicolas-grekas

Glob.php

@@ -61,7 +61,7 @@ public static function toRegex($glob, $strictLeadingDot = true, $strictWildcardS
             $firstByte = '/' === $car;
 
             if ($firstByte && $strictWildcardSlash && isset($glob[$i + 3]) && '**/' === $glob[$i + 1].$glob[$i + 2].$glob[$i + 3]) {
-                $car = $strictLeadingDot ? '/((?=[^\.])[^/]+/)*' : '/([^/]+/)*';
+                $car = $strictLeadingDot ? '/(?:(?=[^\.])[^/]++/)*' : '/(?:[^/]++/)*';
                 $i += 3;
                 if ('/' === $delimiter) {
                     $car = str_replace('/', '\\/', $car);