Change the definition of a buffer queue so that bufqdisksort can
properly deal with bordered writes.
Add inline functions for accessing buffer queues. This should be
considered an opaque data structure by clients.
callout.h:
New callout implementation.
device.h:
Add support for CAM interrupts.
disk.h:
disklabel.h:
tqdisksort->bufqdisksort
kernel.h:
Add new configuration entries for configuration hooks and calling
cpu_rootconf and cpu_dumpconf.
param.h:
Add a priority for sleeping waiting on config hooks.
proc.h:
Update for new callout implementation.
queue.h:
Add TAILQ_HEAD_INITIALIZER from NetBSD.
systm.h:
Add prototypes for cpu_root/dumpconf, splcam, splsoftcam, etc..