* Per-device and device class or similar defaults should be definable in rc.conf also
* The bulk of this functionality could be implemented in a resurrected "dschedctl" utility and exposed through the rc interface using just a thin wrapper, allowing hotplug scripts and etc. an easier option to use the same facilities.
-### Add usage() to vkernels (GCI:Code)
-* Most userspace applications have a (traditionally) usage() routine which prints helpful information when passed -h or -? or any unknown command line argument or incorrect syntax.
-* Add a usage() to the vkernel's argument parsing.
-
### libHAMMER
* HAMMER has the capability to expose very rich information to userland through ioctl's.
* Currently the hammer(8) utility makes use of this information in an ad-hoc manner.