Optimised Sanitizer::removeHTMLtags, Parser::unstrip, Parser::doMagicLinks, Parser...

Optimised Sanitizer::removeHTMLtags, Parser::unstrip, Parser::doMagicLinks, Parser::replaceInternalLinks and Parser::replace_callback. Introduced fast abridged entry point Parser::recursiveTagParse, for recursive parsing called from Cite.php and similar extensions. Resolved a known fail parser test.