Anything left to do?
@MGChecker: Yeah: Release MediaWiki 1.27.0.
Probably MediaWiki 1.27 could get some more fluff. I am also sure that not all new parameters are documented. This however could be piped in new tasks. Neither of this is blocking though.
For the records, 1.27.0 tarball release currently planned for June 28, 2016 according to https://lists.wikimedia.org/pipermail/wikitech-l/2016-June/085894.html