Remove quotes around addressee name in case they are encoded.

Some clients encode quotes with name using base64/quoted-printable
encoding. Quotes were removed only for unencoded strings. Now also
encoded names are handled this way.
So, recipient/sender strings are displayed without quotes around
and e.g. saving to addressbook does not save these redundant quotes.

program/lib/Roundcube/rcube_mime.php

@@ -378,6 +378,10 @@ class rcube_mime
                 }
                 if ($decode) {
                     $name = self::decode_header($name, $fallback);
+                    // some clients encode addressee name with quotes around it
+                    if ($name[0] == '"' && $name[strlen($name)-1] == '"') {
+                        $name = substr($name, 1, -1);
+                    }
                 }
             }
 

tests/Framework/Mime.php

@@ -41,6 +41,7 @@ class Framework_Mime extends PHPUnit_Framework_TestCase
             21 => '"test test"@domain.tld',
             // invalid (#1489092)
             22 => '"John Doe @ SomeBusinessName" <MAILER-DAEMON>',
+            23 => '=?UTF-8?B?IlRlc3QsVGVzdCI=?= <test@domain.tld>',
         );
 
         $results = array(
@@ -68,6 +69,7 @@ class Framework_Mime extends PHPUnit_Framework_TestCase
             21 => array(1, '', '"test test"@domain.tld'),
             // invalid (#1489092)
             22 => array(1, 'John Doe @ SomeBusinessName', 'MAILER-DAEMON'),
+            23 => array(1, 'Test,Test', 'test@domain.tld'),
         );
 
         foreach ($headers as $idx => $header) {