- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Add svn properties to the recently merged bhyve source files.

The pre-commit hook will not allow any commits without the svn:keywords
property in head.

Merge projects/bhyve to head.

'bhyve' was developed by grehan@ and myself at NetApp (thanks!).

Special thanks to Peter Snyder, Joe Caradonna and Michael Dexter for their
support and encouragement.

Obtained from: NetApp

Add support for running as a nested hypervisor under VMWare Fusion, on
systems with VT-x/EPT (e.g. Sandybridge Macbooks). This will most
likely work on VMWare Workstation8/Player4 as well. See the VMWare app
note at:

http://communities.vmware.com/docs/DOC-8970

Fusion doesn't propagate the PAT MSR auto save-restore entry/exit
control bits. Deal with this by noting that fact and setting up the
PAT MSR to essentially be a no-op - it is init'd to power-on default,
and a software shadow copy maintained.

Since it is treated as a no-op, o/s settings are essentially ignored.
This may not give correct results, but since the hypervisor is running
nested, a number of bets are already off.

On a quad-core/HT-enabled 'MacBook8,2', nested VMs with 1/2/4 vCPUs were
fired up. The more nested vCPUs the worse the performance, unless the VMs
were started up in multiplexed mode where things worked perfectly up to
the limit of 8 vCPUs.

Reviewed by: neel

First cut at porting the kernel portions of 221828 and 221905 from the
BHyVe reference branch to HEAD.

Import of bhyve hypervisor and utilities, part 1.
vmm.ko - kernel module for VT-x, VT-d and hypervisor control
bhyve - user-space sequencer and i/o emulation
vmmctl - dump of hypervisor register state
libvmm - front-end to vmm.ko chardev interface

bhyve was designed and implemented by Neel Natu.

Thanks to the following folk from NetApp who helped to make this available:
Joe CaraDonna
Peter Snyder
Jeff Heller
Sandeep Mann
Steve Miller
Brian Pawlowski