Updated mediawiki/extensions
Project: mediawiki/extensions/Scribunto  4c69b1350ec24d62efda0dd6c844d1720e86f891
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Lua library support functions

Adds a base class for libraries with some utility functions in PHP, and a
Lua library with utility functions for use from Lua.

Change-Id: I3d67b1de8bc50488fe3a722e4e2de5849285d127