Currently useful only for single file restore, but kept generic enough
to use any compatible API endpoint over a virtio-vsock[0,1] interface.
VsockClient is adapted and slimmed down from HttpClient.
A tower-compatible VsockConnector is implemented, using a wrapped
UnixStream as transfer. The UnixStream has to be wrapped in a custom
struct to implement 'Connection', Async{Read,Write} are simply forwarded
directly to the underlying stream.
[0] https://www.man7.org/linux/man-pages/man7/vsock.7.html
[1] https://wiki.qemu.org/Features/VirtioVsock
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Stefan Reiter