Garbage collect NFSMINOFF() from the NFS stack; this unused macro replicates
mbuf-initialisation logic that is best left to centralised mbuf utility
code rather than scattered around the kernel.

MFC after:	3 days
Sponsored by:	EMC / Isilon Storage Division


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271175 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f