Updated mediawiki/extensions
Project: mediawiki/extensions/CentralNotice  56b9d581554d770a6b88fcc240b481657617c1f2
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(fr #719) all cookie hiding is configurable

Expiration is always calculated as an interval, there are no cutoff dates.

Two configuration variables are introduced for this purpose,
$wgNoticeCookieShortExpiry and $wgNoticeCookieLongExpiry

Change-Id: I291375ef87291e69292af0d0e27f81ee921e07f4