MFC r264077:
Add BIO_DELETE support to ZVOL.

It is an adapted merge from the vendor branch of:
    701 UNMAP support for COMSTAR  (in part related to ZFS)
    2130 zvol DKIOCFREE uses nested DMU transactions
MFC r264193:
In addition to r264077, tell GEOM that we do support BIO_DELETE now.
MFC r264127

Add PCI-IDs for TBD Gen9 RAID controller HBAs from HP to ciss(4)

Submitted by:	Benesh, Scott <scott.benesh@hp.com>
Sponsored by:	Yahoo! Inc.
MFC r264621

use correct (integer) type for the temperature sysctl

Reviewed by:	np, scottl
Obtained from:	Netflix