MFC r254906 -- add SYSPD (real jbod) support to mfiutil

Add support to reconfigure a drive as SYSPD (real JBOD in LSI
terminology).

Adds command "mfiutil syspd <drive#>" to change a drive to SYSPD.  Drive
will then be scanned/reported immediately as /dev/mfisyspdX by the host.

"mfiutil good <drive#>" clears SYSPD mode, remove /dev/mfisyspdX and
sets disk into UNCONFIGURED mode.

Tested on Dell H310 SAS/SATA RAID controller.
MFC r253980 - new pciids for ciss(4) support
MFC r255320:

Return BUS_PROBE_DEFAULT instead of BUS_PROBE_SPECIFIC.

This change is a 9.2-RELEASE candidate.
Fix the length calculation for the final block of a sendfile(2)
transmission which could be tricked into rounding up to the nearest
page size, leaking up to a page of kernel memory.  [13:11]

In IPv6 and NetATM, stop SIOCSIFADDR, SIOCSIFBRDADDR, SIOCSIFDSTADDR
and SIOCSIFNETMASK at the socket layer rather than pass them on to the
link layer without validation or credential checks.  [SA-13:12]

Prevent cross-mount hardlinks between different nullfs mounts of the
same underlying filesystem.  [SA-13:13]

Security:	CVE-2013-5666
Security:	FreeBSD-SA-13:11.sendfile
Security:	CVE-2013-5691
Security:	FreeBSD-SA-13:12.ifioctl
Security:	CVE-2013-5710
Security:	FreeBSD-SA-13:13.nullfs
Approved by:	so
Merge remote-tracking branch 'upstream-github/stable/9' into stable/9