dev/fd comment and point to fd(4).

a long time, but i'm a bloody slacker...

OK deraadt@

in sys/cdefs.h) instead of _FOO_SOURCE.  Also fix several namespace
pollution issues, including the byte order defines.  OK deraadt@

validate this condition and reject multicast traffic on failure.
ok todd@ naddy@

also start ntpd at this time.
discussed with jmc@; ok deraadt@

and remove fallback code. If somebody is dumb enough to make the
sysctl fail using systrace, he deserves what he gets. Saves 7 syscalls
on process startup.
looks good miod@ ok deraadt@ tedu@

userland-visible sys/select.h.  Consistent with what Net and Free do.
OK deraadt@, tested with full ports build by naddy@.

/root instead of hard links to them.  This way multiuser only changes
a user makes to the to the ones in /root do not screw them over for
getting into single user easily when the have to.
ok millert@

the official assignment by the IANA for the IEEE 802.11f Inter Access
Point Protocol on port 3517 is 802-11-iapp, we use it as an alias.
ok jakob@, deraadt@

should take intptr_t, not int, but we don't presently have intptr_t
available from unistd.h.  OK marco@

ok millert@

jason@. Man page fixes by jmc@, prodding by jsg@. ok mickey@

(not really useful for now, it mostly helps some programs which want
to use it, it will become useful when we have full 16 bits locale).

ok henning beck

ok deraadt@ mickey@

newsyslog truncates wtmp on a weekly basis; note that the ac stuff
remains commented out as before;
spotted by andreas bihlmaier;
ok deraadt@

ok krw@

but I put it at a different place, watchdogd is really not a network daemon

okay deraadt@, otto@
Minor bump (nobody stepped forward with other changes, so let's do this one)

tweaked by tedu@ and myself;

from ray lai;

- do not process mygate for v4 if dhcp
- do not process mygate for v6 if rtsol
this also makes the mygate processing logic more readable
ok krw@