Merge branch 'jt/repack-local-promisor'

"git gc" discards any objects that are outside promisor packs that are referred to by an object in a promisor pack, and we do not refetch them from the promisor at runtime, resulting an unusable repository. Work it around by including these objects in the referring promisor pack at the receiving end of the fetch. * jt/repack-local-promisor: index-pack: repack local links into promisor packs t5300: move --window clamp test next to unclamped t0410: use from-scratch server t0410: make test description clearer