start reading pack files with privsep; still WIP

move pack caching code from pack.c to repository.c

init ibuf only once for the lifetime of a privsep child

implement fork+exec (and by the way, fix the build...)

allow filtering history by paths in 'got log'

scan upwards for git repositories

provide a compile-time toggle for object caching

rename zbuf to inflate

add an object id cache which backs the object cache

undo previous; too much mixup in one data structure

store recently accessed objects at front of cache lists

add some disabled refcount debug code

size object caches independently of each other

add a commit cache as well

no need to manually count elements of a set

add a tree object cache to struct got_repository

introduce struct got_object_cache

implement repository object cache via object_idset

remove debug output

add a very simple object cache

try to infer repository path from work tree

rename 'refs' to 'reference'

remove GOT_ERR_NO_MEM, we can just use errno in those cases

rename the library-internal headers again to a common prefix

move delta cache into struct got_pack