Reverting patch for now:

Reverting patch for now:
* It hard-codes the English string "user", and doesn't allow localized user namespaces.
* Title::makeTitle doesn't perform validity checks as it's meant mainly for data pulled from the database which has been
previously screened. Use Title::makeTitleSafe().
* The ereg_replace is a bit odd. Trimming of stray whitespace from the search term should be done at the top end in
SpecialSearch.php, not down there.