Ticket #15554: 15554.diff

wp-admin/network/site-new.php

@@ -34 +34 @@
                 wp_die( __( 'Can’t create an empty site.' ) );
         $blog = $_POST['blog'];
         $domain = '';
-        if ( ! preg_match( '/(--)/', $blog['domain'] ) && preg_match( '|^([a-zA-Z0-9-])+$|', $blog['domain'] ) )
+        if ( preg_match( '|^([a-zA-Z0-9-])+$|', $blog['domain'] ) )
                 $domain = strtolower( $blog['domain'] );
 
         // If not a subdomain install, make sure the domain isn't a reserved word