* Fix username handling issue with `auprefix` parameter
Usernames are *not* stored in "key" format, and treating them as such will cause various comparisons to misbehave. This was preventing `aufrom` from including the username (as it was supposed to) and would have broken `auprefix` for all comparisons containing spaces.
As a side-effect, both these parameters will now treat underscores as equivalent to spaces.
* Added full text search in titles and content (list=search)
* (bug 10684) Expanded list=allusers functionality
* Possible breaking change: prop=revisions no longer includes pageid for rvprop=ids
* Bug fix: proper search escaping for SQL LIKE queries.
