Add support for delay nodes and linkdelays to FC6 (and 2.6 kernels --

should work on FC4 too).  I haven't changed the linkdelay code -- updating
the kernel modules was enough for that.  The delay node stuff is new.

I figured it was worth the extra few hours to get delays fully working,
but I hadn't banked on the virtual descent into hell that is RED/GRED
parameters.

Things seem to be working pretty well.  Of course, RED/GRED queues aren't
tested.  :-).