* Made upload() explicitly check $status->successCount rather than isOk() as FileRepo::publish() gives fatal statuses where it used to only give warnings. This way, failed uploads still displace the current image DB row to oldimage rather than do nothing and have the same image row point to a new file (which can cause mismatched metadata).
* Disabled exception about invalid oi_archive_name. This makes things more broken in that when people get this an error on upload (which happens when the FS has no current file but the DB does), the new file is added as the current version in the FS but the DB is unchanged. Thus, the metadata can be mismatched.
* Removed bogus rmdir() call.
* Added lock() calls to upgradeRow()/getSha1().
* Use FileRepo getFileSha1() in getSha1() rather than via FSFile.
* Made purgeThumbList()/migrateThumbFile() use FileRepo::cleanupBatch().
* A few other minor cleanups.
* w/s cleanup in recordUpload2().
In FSRepo:
* Removed deleted zone config code from constructor; useless since r107028.
In FileBackend:
* Make sure 'latest' param gets passed through via $params for some functions.
* Cleaned up doMoveInternal() to use *_Internal() functions.
