=== Configuration changes in 1.23 ===
* When $wgJobRunRate is higher that zero, jobs are now executed via an
asynchronous HTTP request to a MediaWiki entry point. This may require
- increasing the number of server worker threads.
+ increasing the number of server worker threads. $wgRunJobsAsync has been
+ added to disable this feature if needed, falling back to executing the job
+ on the same process but making the execution synchronously.
* $wgDebugLogGroups values may be set to an associative array with a
'destination' key specifying the log destination. The array may also contain
a 'sample' key with a positive integer value N indicating that the log group
installer has been updated to use it.
* Changes to content typography (fonts, line-height, etc.). See
https://www.mediawiki.org/wiki/Typography_refresh for further information.
+* The Vector skin's visual treatment of external links has been simplified to a
+ single icon (from nine). This should not affect local rules unless they were
+ re-using these icons, which have now been deleted.
* ResourceLoader: mw.loader.using() now implements a Promise interface.
* Add new hook ChangesListInitRows accessed via ChangesList::initChangesListRows.
If called by the ChangesList consumer this gives extensions a chance to batch
* (bug 42026) Deprecated uctoponly in favor of ucshow=top.
* list=search no longer has a "srredirects" parameter. Redirects are now
included in all searches.
+* Added list=prefixsearch that works like action=opensearch but can be used as
+ a generator.
=== Languages updated in 1.23 ===
* Special:Search no longer has an "include redirects" option on the advanced
tab. Redirects are now included in all searches.
* mediawiki.api.category's getCategories() 'async' parameter was deprecated.
+* The locations of resources have been split between upstream libraries, now in
+ resources/lib/, local libaries in resources/src/, and local forks of upstream
+ libraries, also in resources/src/.
==== Removed classes ====
* FakeMemCachedClient (deprecated in 1.18)