Merge branch 'tb/geom-repack-with-keep-and-max'

Teach "git repack --geometric" work better with "--keep-pack" and avoid corrupting the repository when packsize limit is used. * tb/geom-repack-with-keep-and-max: builtin/repack.c: ensure that `names` is sorted t7703: demonstrate object corruption with pack.packSizeLimit repack: respect --keep-pack with geometric repack