Merge "Fix cache key used by SiteSQLStore."

diff --cc includes/site/Site.php
index d09c64d,078bd26..5394860
--- 1/includes/site/Site.php
--- 2/includes/site/Site.php
+++ b/includes/site/Site.php
@@@ -690,4 -654,4 +700,4 @@@ class Site implements Serializable 
  /**
   * @deprecated
   */
--class SiteObject extends Site {}
++class SiteObject extends Site {}