Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  76cc03bd4421e313e03f417f6acbf47fbb46143e
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Fix adding custom interwiki prefixes

Adds a ParsoidConfig object, and uses it for interwiki prefix handling.

Currently includes the interwiki information that used to be in env, but now
needs to be elsewhere due to the async-ness of environment constructors.

Also fixed some other minor bugs from the config patch.

Change-Id: I8b5dd5a562a74f6ca2fe5d9d8e0b334659ddbeaa