This is probably the more fun bit of programming I've ever done since ever.

Added in this commit is the new 'anvil-self-destruct' program. It works with LSI's new 'storcli' (replaces 'MegaCli64' tool) along with LSI's 'SafeStore' product and Seagate's Self-Encypting Drives w/ Instant-Secure Erase to irrevocably destroy a server's data. In tests on a Fujitsu RX300 S8 with 16x 10krpm SAS drives in RAID level 6 with two hot spares, the self-destruct sequence completed in ~34 seconds. The self-destruct process is;

1. Switch virtual disk cache policy to 'write-through'.
2. Flush the cache.
3. Delete the virtual disk.
4. ISE the drives.
5. Delete the key from the controller.
6. Print 'o' to /proc/sysrq-trigger to power down.

I love my job. :3

Signed-off-by: Madison Kelly (digimer) <digimer@alteeve.ca>