Treat ms-ds-consistencyguid as binary attribute

Like we also do in getAttributes()

Author: tvdijen

lib/Auth/Ldap.php

@@ -477,7 +477,10 @@ public function searchformultiple(
                 // decide whether to base64 encode or not
                 for ($k = 0; $k < $attribute['count']; $k++) {
                     // base64 encode binary attributes
-                    if (strtolower($name) === 'jpegphoto' || strtolower($name) === 'objectguid') {
+                    if (strtolower($name) === 'jpegphoto'
+                        || strtolower($name) === 'objectguid'
+                        || strtolower($name) === 'ms-ds-consistencyguid'
+                    ) {
                         $results[$i][$name][$k] = base64_encode($attribute[$k]);
                     }
                 }