Add support for unix socket

[MoreDelay]

Hey there,

recently my MPD client of choice ncmpcpp went into maintenance mode, so I was looking for some alternatives. This project looks promising, and I can also contribute as I know some Rust. I am using Linux and configured MPD to use a unix socket file. I basically added a thin wrapper around the Client datastructure so that it can listen on that too, if applicable. I also checked these changes with Windows as a target, so this should not break anything.

On the library side, you would need to add a specialization on UnixStream as well. I implemented that too, do you want me to make a PR over there too?

Kind regards.

[eshrh]

Hi, this looks great! Yes, it would help a lot if you also made the changes on the library side (my hope is that my fork of rust-mpd becomes something as many people as possible can depend on).

Thanks for checking this project out, everything is still very new and under development... please feel free to implement (mostly) anything you'd like or leave an issue for feature requests. We'll probably never get to ncmpcpp in terms of raw feature-set, but I think that might be a good thing...