Keep clone files and oversized responses out of the cache

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.

1 file changed, 1 insertion, 0 deletions

diff --git a/source/cgit.h b/source/cgit.h
index 3d3b154..b863e7b 100644
--- a/source/cgit.h
+++ b/source/cgit.h
@@ -223,6 +223,7 @@ struct cgit_config {
 	int cache_summary_ttl;
 	int cache_about_ttl;
 	int cache_snapshot_ttl;
+	int cache_max_slot_size;
 	int case_sensitive_sort;
 	int embedded;
 	int trust_scan_config;