Merge branch 'ds/multi-pack-verify'

"git multi-pack-index" learned to detect corruption in the .midx file it uses, and this feature has been integrated into "git fsck". * ds/multi-pack-verify: fsck: verify multi-pack-index multi-pack-index: report progress during 'verify' multi-pack-index: verify object offsets multi-pack-index: fix 32-bit vs 64-bit size check multi-pack-index: verify oid lookup order multi-pack-index: verify oid fanout order multi-pack-index: verify missing pack multi-pack-index: verify packname order multi-pack-index: verify corrupt chunk lookup table multi-pack-index: verify bad header multi-pack-index: add 'verify' verb