importTextFiles.php can be used to import pages from text files
containing wikitext.
Also, added $userObj to WikiRevision so that it can accept a User
object instead of just a username.
This is a GCI task.
Change-Id: I20eaf2005bdd3d041f55d8c0b108f001c064d638
It seems that when two simultaneous imports of the same page are started,
we get into the situation where $pageId is 0 (or at least something that
is transformed to 0 when inserted into the DB).
I can't reproduce this locally, so I can't tell you *why* this is
happening. But what is important is to stop it from happening.
Bug: T18674
Change-Id: I79406a1ef8e5db9a31f029438f8132ef590216fe