3882 Remove xmod & friends
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Richard Lowe <richlowe@richlowe.net>
	[illumos-gate merge]

commit 694c35faa87b858ecdadfe4fc592615f4eefbb07
    3882 Remove xmod & friends