Updated mediawiki/extensions
Project: mediawiki/extensions/Scribunto  2d9e3c74ba0b11fa84e5869af5d80ec89e814b90

Lua ustring implementation

This is a reimplementation of Lua's string library with support for
UTF-8.

The entire ustring library is implemented in pure Lua. PHP callbacks are
also available for overrides: in LuaSandbox these are used for almost
all functions, while in LuaStandalone they are used only for the pattern
matching. Also, ustring.upper and ustring.lower are overridden using
mw.language's .uc and .lc if available.

It also includes a bunch of unit tests.

Note that if you download the normalization tests, they may fail under
LuaSandbox if you have PHP's intl extension installed and libicu on your
system is too old.

Change-Id: Ie76fdf8d3a85d0a3d2a41b0d3b7afe433f247af0