* mw.Api has a new option, useUS, to use U+001F (Unit Separator) when
appropriate for sending multi-valued parameters. This defaults to true when
the mw.Api instance seems to be for the local wiki.
+* After a client performs an action which alters a database that has replica databases,
+ MediaWiki will wait for the replica databases to synchronize with the master database
+ while it renders the HTML output. However, if the output is a redirect, it will instead
+ alter the redirect URL to include a ?cpPosTime parameter that triggers the database
+ synchronization when the URL is followed by the client.
=== External library changes in 1.28 ===