archwiki: disable the 'live update' feature
By default Special:RecentChanges, Special:Watchlist and similar pages send a request to the server each 3 seconds to see if there have been any changes to the listed pages for the single purpose of showing a "View new changes since" link.
Disable this feature in an attempt to reduce the excessive amount of requests.
See https://www.mediawiki.org/wiki/Manual:$wgStructuredChangeFiltersLiveUpdatePollingRate for the documentation.