Function bind_long_path 

pub(crate) fn bind_long_path<L>(
    path: &Path,
    bind: impl FnOnce(PathBuf) -> Result<L>,
) -> Result<L>

Bind a listener with bind at a socket path whatever its length, see shorten_path. The parent directory gets created if it does not exist. The callers name the socket in the error of a failed bind.