MFC	r249526:
DTrace: print() should try to resolve function pointers

Merge changes from illumos:

3675 DTrace print() should try to resolve function pointers
3676 dt_print_enum hardcodes a value of zero

Illumos Revision:	b1fa6326238973aeaf12c34fcda75985b6c06be1

Reference:
https://www.illumos.org/issues/3675
https://www.illumos.org/issues/3676

Obtained from:	Illumos
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