- 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

As discussed with espie@, ok millert@

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

is reentrant in its current implementation anyway.
Surfing on the recent major version bump, ok millert@ deraadt@

1997 (yes, really).

Add new sys/_types.h header
Include machine/_types.h or sys/_types.h where applicable

Use correct values for _POSIX_TTY_NAME_MAX and _POSIX_LOGIN_NAME_MAX
Define MAXLOGNAME in terms of LOGIN_NAME_MAX
OK krw@

separate errno.h.  sys/errno.h now only contains errno values (which
is included byerrno.h).  OK deraadt@

OK deraadt@

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

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

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

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).

From Solar Designer based on changes in FreeBSD.  OK deraadt@

Make sure tolower/toupper use the whole 8 bits.
okay deraadt@
thanks to everyone who tested

ok henning@

uptodate, namely, wcsto(u)l(l) family, wcstod, stubs from wctrans/towctrans
crank minor.
okay millert@, jmc@.

unsigned but there is no ABI change.  OK deraadt@

explicit about mktemp(3) in the man page.

so do not redefine it.
Found out by the quite picky fixinc in recent gcc.
okay millert@, kettenis@

* introduce the mbstate_t typedef.
impacts gnu libiconv, which has already been taken care of.
* Prepare for mb stuff to really exist, replace macro MB_CUR_MAX with
an external variable __mb_cur_max (impacts libX11 and various ports).
* use mbstate in all the mb <-> wchar functions with state.
* add a stub iswctype function allowing some ports to compile.
bash and gdiff are missing wcscoll, and need to be told there's no i18n
until this is fixed.
Discussed and matthieu, otto, millert, kettenis, deraadt.
Major libc bump

is feasible.
Okay millert@
There's a major libc bump coming that is going to cover this as well...

extended attribute data structure (pimpl idiom). Idea taken from citrus.
Much discussion with deraadt@, otto@, millert@...
This is the least disruptive way to extend FILE, since its size can't really
change without this being a flag day. So the size doesn't change.
Actual additions to the structure will come in separate steps, since this
change is nasty enough on its own.
Tests by otto@ and others, careful reading of code by otto@ and millert@.
This is definitely a major bump, and has been checked to not impact a
full ports build.

for the default locale.
comments, tests, okay: kettenis@, otto@, jmc@
functions addition -> Minor bump.
There's a large bump coming in a separate commit.

gcc 2.95.
tests and okay miod@, marc@.

okay deraadt@, cloder@, pvalchev@
thanks to everyone who commented on that.

and freebsd, apparently written by torek, the man we never see anymore;
submitted by jcs, but he is not around right now for the libc major crank
so i sneak it in for him

useful feedback and ok deraadt@