Chase r284656 and r284658:

Remove the Azure-local vm_extra_create_disk(), since we no longer
need qemu-img to convert the final VHD image to an Azure-compatible
format.

Although the waagent utility is installed from ports, create the
symlink to /usr/sbin, pending investigation on where this is
hard-coded, so it can be reported upstream. In the meantime, this
is good enough.

MFC after: 3 days
X-MFC-Needs: r284269, r284270, r284271, r284655,

		r284656, r284657, r284658, r284659

X-MFC-Note: Required for 10.2-RELEASE, marcel@ has

		implicit approval for the required changes

Sponsored by: The FreeBSD Foundation