Updated mediawiki/extensions
Project: mediawiki/extensions/Parsoid  43dde3a3950dc487052aad84c04295f002295e8f

Set up this.url for ParsoidCacheRequest too

This is used to report cache misses, which is currently less than informative
by always returning 'undefined'.

Change-Id: Ibfef3e332009858987f35029c56203fdeecb7e0d