commiting on behalf of mpi@

(ie. non-kernel) .h file

ok guenther

ok kettenis

to <unistd.h> and confstr(3) per POSIX 1003.1-2008
Change confstr(_CS_PATH) to operate directly instead of calling sysctl(3)
ports build tested by espie@

ports build tested by espie@

defines.
ok deraadt@ millert@

Feedback from millert@ guenther@
OK guenther@ man page bits OK jmc@

ok guenther millert kettenis

grantpt() and unlockpt() using /dev/ptm.  Man pages from FreeBSD.
OK kettenis@ deraadt@ beck@ ajacoutot@ naddy@

int (*)(struct dirent *)
to
int (*)(const struct dirent *)
to match POSIX.
ok millert@, ports check by naddy@

making files stand-alone, some __restrict additions.
tweaks kettenis@; ports testing and fixes landry@ and jasper@
ok millert@

__returns_twice and __dead instead of depending on GCC's special
handling of these function names.
With input from kettenis@ and guenther@
Fixes a warning from clang
ok matthew@

u_int32_t is historical BSD stuff.
fix to match the manpage, namely #include <stdint.h> as a prerequisite.
okay millert@

Much ports testing of various versions by naddy@ and jasper@
ok matthew@, miller@

okay ratchov@

three things that it needed from there: INET_ADDRSTRLEN, INET6_ADDRSTRLEN,
and struct in_addr.  Add protecting #ifndefs to netinet6?/in6?.h for those.
ok deraadt@

ok deraadt@

Add __restrict bits for tdelete()
ok deraadt@

suggested by deraadt@

NL_{ARG,LANG,MSG,SET,TEXT}MAX with newer POSIX.
Hide {FLT,DBL}_{DIG,MAX,MIN} and {PASS,TMP,NL_N}_MAX with newer XPG.
Make _POSIX_NGROUPS_MAX and _POSIX_OPEN_MAX conditional on the POSIX
version, like _POSIX_TZNAME_MAX already is.
Add some more _POSIX_* and _XOPEN_* 'specified' limits.
ok kettenis@

of the latter.  Permits the misleading lib/libpthread/Makefile to be
removed
discussed with deraadt@

MI float.h which pulls in and defines the values that are needed from
there, and repair sys/limits.h so that it defines the values it needs
as well (depending on POSIX version, XPG version, etc).  guenther has
a more exact selection of that coming for limits.h.
this also fixes a few mistakes for the vax.
reviewed by kettenis and guenther.

all the symbols that POSIX says they must and fewer that they can't and,
most importantly, to not require a specific ordering of headers.
ports testing by naddy@
ok millert@ deraadt@

so that it can't get a signal while still running on the parent thread's
stack.  Also, pass in sizeof(struct __tfork) to provide forward compat
when more members are added.  This is an ABI change, so switch syscall
numbers and bump lib majors this time.
ok deraadt@ matthew@

- everything that has prereq will also do includes, add it late, so that
gnu stuff (the only part with prereq) happens late.
- new RUN_MAKE snippet, to be able to have the makefile magically decide
between Makefile.bsd-wrapper and Makefile.
So there's no longer any need to remember complicated rules: add it to
RDIRS if it just wants make includes, add it to PRDIRS if it wants prereq too,
and that's all.
okay deraadt@, miod@

from the most recent version, use the implementation namespace for variables
in inline functions, and add __restrict as specified.
ok millert@

Bulk build test by naddy.

and valloc() are not in the current version, while posix_memalign() mkstemp(),
and mkdtemp() are, and setstate()'s argument has lost a bogus 'const'.
ok millert@ jmc@ espie@ kettenis@; ports build testing by naddy@

from sys/unistd.h to unistd.h.
From Brad; ok millert and me

as NULL has. This will (hopefully) simplify ports where the user
passes the device string.

ok guenther, millert (and me); bulk build test by naddy

Okay otto@

* strptime(3) was introduced in XPG 4.0
* clock_gettime(3) and friends were introduced in 1003.1b-1993
* asctime_r(3) and friends were introduced in 1003.1c-1995
and conditionally provide prototypes and associated types accordingly.
This makes our <time.h> standards compliant except for some functions that are
still missing.
ok guenther@

friends in <time.h>.  The kernel needs access to the associated #defines, but
can't get them from <time.h>, so introduce a new header <sys/_time.h> and
include that from <time.h> for userland and <sys/time.h> for the kernel.
ok matthew@, guenther@, millert@

suggested by deraadt@

of POSIX-2001, without the XSI qualifier.  Adjust conditionals to match.
ok millert@

requests the pre-standardized version
requested by millert@

typedef regardless of __BSD_VISIBLE, and eliminate the dirfd() macro.
ok guenther@

use "const struct dirent **" instead of "const void *".  Also, add
__restrict to readdir_r().
ok matthew@

to be pruned later when DIR is made an opaque type.
ok guenther@; prodding by brad@ for VLC and other ports

Prompted in a mail to tech@ by Jan Klemkow (j-dot-klemkow-at-wemelug-dot-de)
but this is based on NetBSD's implementation instead with some tweaks by me.
Further improvements would happen in tree.
ok millert@; discussed with many others
ports cleanup by naddy@, sthen@. Antti Harri, Gonzalo L. R. and myself.

FreeBSD's implementation via Frank Denis, with various cleanups and
tweaks by me.
ok deraadt@, guenther@; discussions and tweaks from many others
jmc@ promises to help me further with the man pages in tree