remove redundant check on size. ok millert@ deraadt@

actually help us find bugs later (with lint, not cc), if they get
introduced

- Fix semantics: seekdir(pos); telldir() shoud return pos. The code
that implements this will be made faster in a later commit.
- We loose documented behaviour (after closedir() the telldir()
positions are not valid anymore). This was never in Posix, and most
other systems have nothing like it.
Diff originally from Paul Thorn, rewritten by me using some FreeBSD
code.  "slap it in" deraadt@

updated but the function itself never was; ok millert

ok jmc@ otto@

driver

suggested and ok by kettenis@

we are making the move where ttya will become the zs devices, and tty00
will support com(4) devices. ok drahn

or if malloc must be used suggest check.
Get rid of "one".
OK deraadt@ and jmc@, OK kjell@ to earlier version with "one"s.

ok naddy@ todd@

grep should assume ASCII text, fixes umask detection
ok millert@ jaredy@

David Hill's diffs.
ok otto

to (for instance) interrupt dhclient with a ^C instead of a 'CAPS-LOCK C'
from e@molioner.dk checked by matthieu

doubly mounted mfs partitions. Also, at the end of the mount dance,
try mount all partitions, not just nfs partitions. Handles a case
where local paritition mounted inside a nfs partition where not
mounted by rc (/usr on nfs with a local /usr/obj, for example).
ok deraadt@ henning@

mode (tested with the HP ProCurve 420wl). add a note to the manual page and
the example configuration.

originally reported by Gergely Kovacs; help from dhartmei@;
ok tedu@ millert@

`looks to be safe' millert, okay tedu.

from jared rr spiegel, closes PR 4982, ok beck@

As discussed with espie@, ok millert@

fixes pr #4996, from joachim schipper;

ok henning@

ok beck@ kettenis@ norby@

has a rdo on $int_if that stops working then. pt out by cedric

openwall.com, ok henning@

"yes, that is correct." jmc@ (a while back)

tell user to get it through stdint.h (note old sys/types.h still works,
for now).
okay millert@, jmc@