* jc/boundary:
git-bundle: prevent overwriting existing bundles
git-bundle: die if a given ref is not included in bundle
git-bundle: handle thin packs in subcommand "unbundle"
git-bundle: Make thin packs
git-bundle: avoid packing objects which are in the prerequisites
bundle: fix wrong check of read_header()'s return value & add tests
revision --boundary: fix uncounted case.
revision --boundary: fix stupid typo
git-bundle: make verify a bit more chatty.
revision traversal: SHOWN means shown
git-bundle: various fixups
revision traversal: retire BOUNDARY_SHOW
revision walker: Fix --boundary when limited