Merge branch 'tb/multi-cruft-pack'

Use of --max-pack-size to allow multiple packfiles to be created is now supported even when we are sending unreachable objects to cruft packs. * tb/multi-cruft-pack: Documentation/gitformat-pack.txt: drop mixed version section Documentation/gitformat-pack.txt: remove multi-cruft packs alternative builtin/pack-objects.c: support `--max-pack-size` with `--cruft` builtin/pack-objects.c: remove unnecessary strbuf_reset()