- list NOxxx and LDSTATIC= assignments before everything else
(especially <bsd.own.mk>)
- ensure <bsd.own.mk> is included before NETBSDSRCDIR is used
- add missing RCSids
- Use CMSG_SPACE() and CMSG_DATA() properly; don't define structures
to hold messages, which will not have the correct alignment after
the cmsg header.