sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

hv_hid: Hyper-V HID driver

Hyper-V HID driver using hidbus/hms.

Reviewed by: wulf
MFC after: 1 week
PR: 221074
Differential revision: https://reviews.freebsd.org/D38140

HyperV socket implementation for FreeBSD

This change adds Hyper-V socket feature in FreeBSD. New socket address
family AF_HYPERV and its kernel support are added.

Submitted by: Wei Hu <weh@microsoft.com>
Reviewed by: Dexuan Cui <decui@microsoft.com>
Relnotes: yes
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D24061

hyperv/storvsc: Fix the blkvsc disk attachment issues.

- The original 'disengage' ATA controller model does not work properly
for all possible disk configurations. Use the newly added ATA disk
veto eventhandler to fit into all possible disk configuration.
- If the 'invalid LUN' happens on blkvsc controllers, return
CAM_DEV_NOT_THERE so that CAM will not destroy attached disks under
the blkvsc controllers.

Submitted by: Hongjiang Zhang <honzhan microsoft com>
Discussed with: mav
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7693

Connect the stordisengage driver to the build.

Import Microsoft HyperV driver update
From https://github.com/FreeBSDonHyper-V/VendorBranchForFreeBSDonHyper-V
rev: 3c707c73520adbd6d1f4ff009826dbbfb0c2dc4d

make glue to hook up the hyperv kmods to the build.

Modified from the original Microsoft versions to pull
code/headers in from the sys/contrib/dev directory.

Initial import of the Microsoft HyperV 'enlightened' drivers.

From https://github.com/FreeBSDonHyper-V/VendorBranchForFreeBSDonHyper-V
rev: 99eaa0ddb0485c9d76046664100f6beb1a0a0c58