mod4 in terminal is ignored, works from gui

[Sam Halliday]

Hi all,

I am using xmonad as my window manager, urxvt as my terminal emulator, and 
emacs24.

When I start the gui version of emacs, I am able to use my "windows" (mod4) key 
as the super key and I can issue key commands such as "s-s" (which emacs 
doesn't recognise yet, but I plan to use it for something).

However, when I start `emacs -nw` from urxvt, the mod4 is completely ignored. 
If I type "windows"-s, then just "s" is printed to the screen.

For ease of moving around, my config files are public:

  https://github.com/fommil/unix

Could somebody please help me to get emacs in terminal mode to recognise the 
mod4 key?

Best regards,
Sam