[PATCH] add 'svnadmin verify' pass to hot-backup.py.in

 Hello,

I've found it useful to verify my backups using 'svnadmin verify' and
thought it would make a good addition to hot-backup.py.

[[[
* tools/backup/hot-backup.py.in
    Added command line option "--verify". If flag is present, the
hotcopy will be verified.
    Added a new pass between the existing steps 3 and 4 (hotcopy and
compress) that
    invokes 'svnadmin verify' on the hotcopy. If verification fails, the
script exits with an error.
]]]

Cheers,
Leo