This module is basically XMonad.Prompt.Ssh
with a slight modification of the function sshPrompt
to allow passing a custom command with the ssh argument.
This is useful, if you need to start something inside the new window, like for example tmux.
Usage example (taken from my Xmonad configuration):
((shiftMask .|. controlMask, xK_s),
sshPrompt promptConfig (\p -> runInTerm "" $ "ssh -t " ++ p ++ " tmux -2 new-session"))