It wasn't copying html/ops/db_update.php,
so it wasn't doing necessary DB updates.
Fixed this by always copying html/ops/*.
Even with this fix, there is a problem when using
the --server_only or --web_only options of upgrade:
if any DB updates are done, they may affect the
server code that's not being updated, resulting in crashes.
I added a warning message in this case,
recommending that a full upgrade be done.
svn path=/trunk/boinc/; revision=22200