* Introduced $wgVaryOnXFPForAPI which will cause the API to send
Vary: X-Forwarded-Proto headers.
* New maintenance script to refresh image metadata (maintenance/refreshImageMetadata.php)
-* (bug 30722) Add a new collation that sorts categories in ascii sort order.
+* (bug 30722) Add an identity collation that sorts things based on what the
+ unicode code point is (aka pre-1.17 behaviour)
=== Bug fixes in 1.18 ===
* mw.util.getScript has been implemented (like wfScript in GlobalFunctions.php)