usr.sbin/mopd: When building the vax-mopcopy host tool,
preferentially include "nbtool_config.h" over "port.h"

OK rin@

Quick+Dirty port to linux

ANSIfy, sprinkle "const"

Follow upstream's lead and remove third and fourth clauses (except on
from usr.sbin/mopd/common/pf.c, where only the ad clause is removed,
because it has a shared UCB copyright) on Mats O Jansson's f

Follow upstream's lead and remove third and fourth clauses (except on
from usr.sbin/mopd/common/pf.c, where only the ad clause is removed,
because it has a shared UCB copyright) on Mats O Jansson's files.

thorpej OK'd usr.sbin/rpc.yppasswdd/yppasswdd_mkpw.c, where he shares
copyright.

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- WARNsify
- KNFify (a bit)
- use int32_t & u_int32_t instead of long and u_long
- clean up man pages a bit

RCS id police.

Import of Mats O Jansson's MOP boot program for DEC machines.