Ticket #15004: 15004.diff

wp-admin/includes/upgrade.php

@@ -1956 +1956 @@
   activation_key varchar(50) NOT NULL default '',
   meta longtext,
   KEY activation_key (activation_key),
-  KEY domain (domain)
+  KEY domain (domain),
+  KEY domain (user_email)
 ) $charset_collate;
 ";
 // now create tables