py

    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