MFC r249526, r249600:

MFC	r249526, r249600:
DTrace: NFS translators should be split into client/server pieces

Merge change from illumos:

1731 DTrace NFS translators should be split into client/server pieces

Include Changes from OpenSolaris:
PSARC 2008/050 DTrace NFS v3 Provider
6696397 NFS v3 provider reports all UDP clients as 0.0.0.0
6711844 assert: vp-->v_shrlocks

Illumos Revision:	13523:6763769941d2

This code seems to be currently unused on FreeBSD.

Reference:
https://www.illumos.org/issues/1731

Obtained from:	Illumos

git-svn-id: svn://svn.freebsd.org/base/stable/9@250486 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f