HEADSUP: kbdmux(4) is in both HEAD and RELENG_6

Dear Hackers,

kbdmux(4) is now fully integrated into HEAD and RELENG_6. please give it 
a try and let us know if you have any problems.

there is one more cosmetic change that i'd like to get in. please take a 
look at the following patch

http://people.freebsd.org/~emax/kbdmux-etc.diff.txt

(freefall:~emax/kbdmux-etc.diff.txt)

the idea is to add new 'setkeyboard' method to the /etc/rc.d/syscons. it 
accepts the keyboard device name (i.e. /dev/kbd0). this method will do 
nothing is kbdmux(4) is the current active keyboard, otherwise it will 
switch active keyboard as requested. the ukbd(4) entries in the 
/etc/devd.conf are modified to use /etc/rc.d/syscons and new 
'setkeyboard' method. basically, imo, this should make it consistent for 
both kbdmux and non-kbdmux cases.

thanks,
max