Add a custom kernel configuration file for my laptop.
Remove ATA_CAM and related options.
Merge branch 'master' into markj-kernel-config
Add ipdivert.
Merge branch 'master' into markj-kernel-config
Add snp(4).
Add em(4) for VirtualBox.
Merge branch 'master' into markj-kernel-config
Merge branch 'master' into markj-kernel-config
Include the tap(4) driver.
Merge branch 'master' into markj-kernel-config
Merge branch 'master' into markj-kernel-config
Merge branch 'master' into markj-kernel-config
Merge branch 'markj-kernel-config' into 20130529-dtrace-sdt-arg-test
Fix all of the issues related to fetching the (n >= 6)th argument to a
probe.

* Port the SDT test by getting dtrace_test to create a sysctl to trigger
  the test probe.
* Fix a couple of bugs in the way that getarg() works: the aframes value
  for our SDT implementation should be 1, not 0, and the first stack
  argument on amd64 is at stack[-1], not stack[0] in dtrace_getarg().
* Add macros for SDT probes with 6 or 7 arguments.