- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC 259641,259863,259924,259937,259961,259978,260380,260383,260410,260466,
260531,260532,260550,260619,261170,261453,261621,263280,263290,264516:
Add support for local APIC hardware-assist.
- Restructure vlapic access and register handling to support hardware-assist
for the local APIC.
- Use the 'Virtual Interrupt Delivery' and 'Posted Interrupt Processing'
feature of Intel VT-x if supported by hardware.
- Add an API to rendezvous all active vcpus in a virtual machine and use
it to support level triggered interrupts with VT-x 'Virtual Interrupt
Delivery'.
- Use a cheaper IPI handler than IPI_AST for nested page table shootdowns
and avoid doing unnecessary nested TLB invalidations.

Reviewed by: neel

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

Provide per-vcpu locks instead of relying on a single big lock.

This also gets rid of all the witness.watch warnings related to calling
malloc(M_WAITOK) while holding a mutex.

Reviewed by: grehan

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