[sec-OpenMage#432] Remove support for quoted-string email address format

fixes OpenMage#387

Author: colinmollenhour

lib/Zend/Validate/EmailAddress.php

@@ -424,18 +424,8 @@ private function _validateLocalPart()
         if (preg_match('/^[' . $atext . ']+(\x2e+[' . $atext . ']+)*$/', $this->_localPart)) {
             $result = true;
         } else {
-            // Try quoted string format (RFC 5321 Chapter 4.1.2)
-
-            // Quoted-string characters are: DQUOTE *(qtext/quoted-pair) DQUOTE
-            $qtext      = '\x20-\x21\x23-\x5b\x5d-\x7e'; // %d32-33 / %d35-91 / %d93-126
-            $quotedPair = '\x20-\x7e'; // %d92 %d32-126
-            if (preg_match('/^"(['. $qtext .']|\x5c[' . $quotedPair . '])*"$/', $this->localPart)) {
-                $result = true;
-            } else {
-                $this->_error(self::DOT_ATOM);
-                $this->_error(self::QUOTED_STRING);
-                $this->_error(self::INVALID_LOCAL_PART);
-            }
+            $this->_error(self::DOT_ATOM);
+            $this->_error(self::INVALID_LOCAL_PART);
         }
 
         return $result;