Commit Briefs
don't override port configuration with explicit argument if the url doesn't contains it
it permits to .ssh/config to be honored same diff from stsp@
stop verifying pack file checksum in the main process during clone/fetch
Both got-fetch-pack and got-index-pack now verify the pack file checksum. This means we can avoid reading the entire pack file in the main process just to verify its checksum and avoid a noticable stall between fetching and indexing on slow machines.