Ahead of any decision to merge this extension into core, let's
actually fix this now.
Bug: T357646
Change-Id: I5128ce524c1a6a04bbe8b7607747eab84d892059
The use of "HookHandlers" attribute in extension.json makes it possible
to inject services into hook handler classes in a future patch.
Bug: T271017
Change-Id: Ia27729fb69a0c80493b386f2e5d913602fb50698
The global function wfWikiID() is deprecated since 1.35 and it's usages
should be replaced with WikiMap::getCurrentWikiId().
Bug: T298059
Change-Id: I1bf004218b30b2324c1dd87c18fab9945be04371
Currently failing with "Error: Call to undefined function MediaWiki\Extension\Interwiki\Hooks()"
Bug: T283539
Change-Id: Iedbf0880814aac2ea414448ef84b307bcbf2fd41