Stop caching clone files and oversized responses

The dumb transport reads files that already sit on the disk, so a pack
copied into a slot cost that disk twice and the request a second write
of every byte. A snapshot took a slot whatever its size, so a visitor
naming distinct refs and ids could fill the cache root with archives.
cache-max-slot-size, 64 MB unless set, now serves a larger response from
the lock file and drops it, along with any expired copy it would have
replaced.

0 files changed, 0 insertions, 0 deletions