Use `FilePath` instead of `ByteString`?

[lpeterse]

I already thought about this a while ago and asked myself whether it should be ByteString or System.IO.FilePath within SocketAddress Unix.

The latter would be more consistent with the rest of the Haskell world and would allow to use the filepath library for path manipulation. Encoding issues may arise on the other hand though.

[VyacheslavHashov]

On Unix and Linux systems filepath is a sequence of raw bytes terminated by NUL. This library http://hackage.haskell.org/package/unix-2.7.2.0/docs/System-Posix-ByteString.html defines it as
type RawFilePath = ByteString
and allows POSIX-compatible path manipulation already.