Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticForms  df6b9c86c142167353bee92c2c2aea49c15c07ce

Fix broken forms at tieteentermipankki.fi

The reasons seems to be that calling ParserOutput::getText() only
works for once, and returns UNIQ markers the second time.

Cleaned up the caching code while at it.

Change-Id: Iec9cdb1b8390325a2baecec5f370449badab9390