redo-sh.do: add mksh to the list of possible shells.
redo-sh.do: add mksh to the list of possible shells.

rowhit/redo,apenwarr/redo,dinkelk/redo-python,pombredanne/redo,apenwarr/redo,pombredanne/redo,dinkelk/redo-python,apenwarr/redo,dinkelk/redo-python,apenwarr/redo,pombredanne/redo,rowhit/redo,dinkelk/redo-python,pombredanne/redo,rowhit/redo,rowhit/redo