Fix the backspace key under X11 and make the 'option' key behaves like in console. The 'command' key is now the alt modifier.
Fix the backspace key under X11 and make the 'option' key behaves like in
console. The 'command' key is now the alt modifier.

Based on a diff from shadchin@ with inputs from miod@

ok shadchin@, miod@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars