do that if pf is actually enabled (rely on pfctl -si)
requested by deraadt@

ok robert@

and complex math routines are complete.  OK kettenis@.

extended-precision support.  Mostly from Cephes.

ok robert@ deraadt@

the wcsdup example.
ok stsp

startups according to rules that some of us understand.  it may come of
sounding cocky, but any step beyond that would end up with a dependency
graph which will never happen.  this file is now ~60% of the length a
week ago.
ok guenther, robert, aja and people who will not test it until it is in

accordingly.
ok robert@

ok robert@

rc_pre() functions are returning correctly. This change
also simplyfies the changes because false || return 1 can be replaced
with false if that's the last call. thanks halex@!

ok halex

can run surprisingly early.  Move the X socket directory creation code
into a function too.
robert liked it

ok robert@

spotted by halex@

at the right place.

ok robert@

ok halex@

silently now.
ok guenther

(As a reminder to others who spot this weirdness later and get
confused like I did:  netstart never starts pfsync automatically,
because it would screw the states.  That is why there is this 2nd
manual netstart run for pfsync)
ok mpf

switched a while back.
ok miod, kettenis

the bottom, after checking that they are OK with being there.
ok ajacoutot

ok robert@ deraadt@

* if we try to reload a non running daemon, just exit gracefully, like
we do for 'stop'
* add an rc_check call right after rc_reload to make sure the daemon is
still around; until now we only checked the pkill(1) return code but
that is not enough
ok robert@

changes to libevent and zlib headers sent to the upstream maintainers.
ok jmc@ (for typos), millert@

patch originally suggested by mk@; sthen@, naddy@ and ajacoutot@ agree.