accept weird directive names

like text/vnd.sun.j2me.app-descriptor

Author: romanpitak

src/Directive.php

@@ -171,14 +171,14 @@ private static function processText($text)
     }
 
     private static function checkKeyValue($text) {
-        if (1 === preg_match('#^([a-z_]+)\s+([^;{]+)$#', $text, $matches)) {
+        if (1 === preg_match('#^([a-z][a-z0-9._/+-]*)\s+([^;{]+)$#', $text, $matches)) {
             return array($matches[1], rtrim($matches[2]));
         }
         return false;
     }
 
     private static function checkKey($text) {
-        if (1 === preg_match('#^([a-z_]+)\s*$#', $text, $matches)) {
+        if (1 === preg_match('#^([a-z][a-z0-9._/+-]*)\s*$#', $text, $matches)) {
             return array($matches[1], null);
         }
         return false;