libc/stdtime: Remove some #ifdef checks for TM_{GMTOFF,ZONE}.

We don't override those and use the defaults from private.h.

While here, clean up the CFLAGS of zdump(8) and zic(8). Most of this
isn't

libc/stdtime: Remove some #ifdef checks for TM_{GMTOFF,ZONE}.

We don't override those and use the defaults from private.h.

While here, clean up the CFLAGS of zdump(8) and zic(8). Most of this
isn't needed.

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In several standard headers, harmonize checks for legacy defines etc.

When something goes away in a certain issue of the standard, always
check with < $standard, not <= $previous_standard. Also, uni

In several standard headers, harmonize checks for legacy defines etc.

When something goes away in a certain issue of the standard, always
check with < $standard, not <= $previous_standard. Also, uniformly
check for __XSI_VISIBLE or __POSIX_VISIBLE being > 0 in these cases.

While here, fix a small nit in <sys/wait.h>: wait3() was removed
from Issue 6, but the requirement to define the rusage structure was
removed from Issue 7.

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Move fpclassify.3 from libc to libm where it belongs.

libc - MFC resolver fix

* Allows intermediate domain names with an underscore.

* Fixes lookups of 'www.office.com' and 'www.newegg.com', and
probably other domains.

Reported-by: kerma
Diagnosed-

libc - MFC resolver fix

* Allows intermediate domain names with an underscore.

* Fixes lookups of 'www.office.com' and 'www.newegg.com', and
probably other domains.

Reported-by: kerma
Diagnosed-by: kerma, tautology

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wcscoll.3: Remove leading '+' from copy/paste from a patch.

vis(3): Add VIS_ALL support

OpenSSH requires VIS_ALL and therefore uses the version bundled with
itself, but this causes the vis.o symbol conflicts between libc and
libssh when crunching fstyp(8) wi

vis(3): Add VIS_ALL support

OpenSSH requires VIS_ALL and therefore uses the version bundled with
itself, but this causes the vis.o symbol conflicts between libc and
libssh when crunching fstyp(8) with ssh(1).

Bump __DragonFly_version.

Based-on: OpenBSD

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libc/xdr: Add xdr_uint16_t() (it's just like xdr_u_int16_t()).

dports might make use of it.

While here, improve the manual page a bit and also bring in some fixes
from FreeBSD.

libc/xdr: Use standard types.

kernel - Fix umtx (pthread_mutex etc) race in kernel

* The umtx code could still race a fork despite the wakeup
due to certain access paths leading into umtx_sleep() only
issuing reads, thus not

kernel - Fix umtx (pthread_mutex etc) race in kernel

* The umtx code could still race a fork despite the wakeup
due to certain access paths leading into umtx_sleep() only
issuing reads, thus not triggering a COW operation post-fork.
This results in a loss of the interlock.

* Fix the issue by having umtx_sleep() fetch the user data
with a read-modify-write instead of a read. It now essentially
does a lock xadd, adding $0 to the memory to force a write
fault if necessary.

* Fixes 'go' tests and probably other situations that can arise
when heavily threaded programs use fork/exec.

Reported-by: Tim Darby (+testing)

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{un,}vis.3: Bring back some small fixes we had earlier.

Bring in an errno.9 manual page (based on NetBSD's).

libc/termios: #undef TTYDEFCHARS after including <termios.h>.