HEAD users - buildworld/installworld needed before next buildkernel/installkernel

[Matthew Dillon]

    The kernel & modules are now being installed in /boot/kernel and
    /boot/modules instead of /kernel and /modules.

    Because of this change installkernel will refuse to install if you
    have not installed a new world and upgraded to the latest HEAD.
    A new world install is needed so the loader properly checks both
    places and the make upgrade is needed to move the existing
    kernel & modules from / to /boot.  Otherwise / can wind up with four
    copies and run out of space.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>