Support for unix socket in MPD widget

[martindube]

Hi,
This is a small suggestion to support Unix Socket in MPD.
Thank you,

[lcpz]

This introduces GNU netcat as dependency, which is not part of every distro core installation.

Please, investigate if is there a Pure Lua/Awesome API implementation.

Also, note that if you want to use sockets, this recipe might be of interest.

[Veratil]

An alternative to netcat I've seen is piping into /dev/tcp/.... Something like this:
echo 'blah blah' > /dev/tcp/address/port

[unode]

Maybe this? - references same code that @copycat-killer linked above.

[lcpz]

@unode Another thing I want to do for lain first release is to get rid of curl in mpd, imap and weather, in order to remove any external dependency.

Eventually, this PR might be overridden, or pushed, along with the curl-dependent code, as a recipe on the awesome site.

[unode]

@copycat-killer by "get rid" I hope you mean replacing them with lua native api's such as luacurl.
If you remove the widgets people will miss them :)

[lcpz]

@unode By "get rid" I'm referring to curl.

I want to replace it with GLib via lua-lgi (which is an Awesome dependency).