Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

This is required for a further change that will make use of a field
that was added in version 0x00040d00.

No functional change expected.

Sponsored by: Citrix Systems R&D

Sponsored by:	Rubicon Communications, LLC ("Netgate")

The current definition for the MMAP_RESOURCE ioctl was wrong as it
didn't copy back the result to the caller. Fix the definition and also
remove the bogus attempt to copy the result in the implementation.

Note such copy back is only needed when querying the size of a
resource.

Sponsored by: Citrix Systems R&D

Use an interface compatible with the Linux one so that the user-space
libraries already using the Linux interface can be used without much
modifications.

This allows an open privcmd instance to limit against which domains it
can act upon.

Sponsored by:	Citrix Systems R&D

Use an interface compatible with the Linux one so that the user-space
libraries already using the Linux interface can be used without much
modifications.

This allows user-space to make use of the dm_op family of hypercalls,
which are used by device models.

Sponsored by:	Citrix Systems R&D

The interface is mostly the same as the Linux ioctl, so that we don't
need to modify the user-space libraries that make use of it.

The ioctl is just a proxy for the XENMEM_acquire_resource hypercall.

Sponsored by:	Citrix Systems R&D

Preparatory change for further additions that will also make use of
the same code. No functional change.

Sponsored by:	Citrix Systems R&D

There's no reason for them to be signed. No functional change.

Sponsored by:	Citrix Systems R&D