Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r246166

Update hwpmc to support the Xeon class of Ivybridge processors.
case 0x3E: /* Per Intel document 325462-045US 01/2013. */

Add manpage to document all the goodness that is available in this
processor model.

No support for uncore events at this time.

Approved by: sbruno (mentor)

MFC r241974

Cleanup and rename some variables in libpmc and hwpmc.

Testing MFC of merge to root of stable/9 with peter@ lurking.

MFC r241745,241738,241741

Update hwpmc to support the Xeon class of Sandybridge processors.
(Model 0x2D /* Per Intel document 253669-044US 08/2012. */)

Update man page crossreferences to sandybridge xeon class

Remove trailing whitespace.

MFC r240164, r240203:
Add Intel Ivy Bridge support to hwpmc(9).
Update offcore RSP token for Sandy Bridge.
Note: No uncore support.

Add Intel Ivy Bridge support to hwpmc(9).
Update offcore RSP token for Sandy Bridge.
Note: No uncore support.

Will works on Family 6 Model 3a.

MFC after: 1 month
Tested by: bapt, grehan