Rename $wgPurgeHttp11 to $wgSquidPurgeUseHostHeader, set it to true by
default, and update the documentation per the research I've done on
Squid's behaviour. See bug 39005.
Rewrote the release note and moved it to the correct section.
Change-Id: I9ef6a0c43fc1ba4547b34124a47815296f45b20e
Allow SquidPurgeClient to send HTTP/1.1 PURGE requests with a Host header instead of
only sending HTTP/1.0 requests with the whole url in the PURGE line.
This is necessary to support some other reverse caching proxies like Varnish.
Change-Id: I85fe93a8ca97c5169f250967540e29fc70725119
Also made file/class documentation more consistent and removed a duplicate comment from SpecialPageFactory.php in SpecialPage.php.
Change-Id: I99dd2de7fe461f2fad4e0bd315ebc2899958a90f