zsh: use url completion for mpc add
zsh: use url completion for mpc add

I don't actually have a mpc database, I just play files and streams from
a NFS filesystem and the internet. The local files are mostly sitcoms I
play of which I play the audio. As a result a database doesn't make much
sense.

paretje/dotfiles,paretje/dotfiles,paretje/dotfiles,paretje/dotfiles,paretje/dotfiles