Merge branch 'jk/daemon-interpolate' into maint

The "interpolated-path" option of "git daemon" inserted any string client declared on the "host=" capability request without checking. Sanitize and limit %H and %CH to a saner and a valid DNS name. * jk/daemon-interpolate: daemon: sanitize incoming virtual hostname t5570: test git-daemon's --interpolated-path option git_connect: let user override virtual-host we send to daemon