Function mpdpopm::commands::spawn

pub fn spawn<S, I>(
    cmd: S, 
    args: I, 
    params: &HashMap<String, String>
) -> Result<PinnedCmdFut, Error> where
    I: Iterator<Item = String>,
    S: AsRef<OsStr> + Debug, 

Start process cmd with args I & return; the results will be available asynchronously

If cmd is not an absolute path, PATH will be searched in an OS-defined way.