When request's tls info is not obtained, read the scheme from header. Since dockyard might be put behind a proxy server and configured to listen on a unix socket.
When request's tls info is not obtained, read the scheme from header.
Since dockyard might be put behind a proxy server and configured to
listen on a unix socket.

victorwangyang/containerops,victorwangyang/containerops,victorwangyang/containerops,victorwangyang/containerops,victorwangyang/containerops