Merge branch 'jk/prune-packed-server-info'

Fix recent breakage in Git 2.2 that started creating info/refs and objects/info/packs files with permission bits tighter than user's umask. * jk/prune-packed-server-info: update-server-info: create info/* with mode 0666 t1301: set umask in reflog sharedrepository=group test