Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

pkgbase: Create a FreeBSD-nfs package

And move all the nfs related commands there.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D30754
Sponsored by: Diablotin Systems

Add a command the displays and modifies the pNFS server's extended attribute.

This command allows a sysadmin to display or modify the pnfsd.dsfile extended
attribute used by the pNFS MDS server in various ways.
Its main use is to set a DS's IP address to 0.0.0.0 when that DS has failed,
so that it will not be used for the file when brought back online after
being repaired.