Merge branch 'rj/receive-pack-avoid-sigpipe-during-status-reporting'

When the "git push" command is killed while the receiving end is trying to report what happened to the ref update proposals, the latter used to die, due to SIGPIPE. The code now ignores SIGPIPE to increase our chances to run the post-receive hook after it happens. * rj/receive-pack-avoid-sigpipe-during-status-reporting: receive-pack: ignore SIGPIPE while reporting status to client