Merge in 2022g:

Although tzcode still works with C89, bugs found in recent routine
maintenance indicate that bitrot has set in and that in practice
C89 is no longer used to build tzcode.

Merge in 2022g:

Although tzcode still works with C89, bugs found in recent routine
maintenance indicate that bitrot has set in and that in practice
C89 is no longer used to build tzcode. As it is a maintenance
burden, support for C89 is planned to be removed soon. Instead,
please use compilers compatible with C99, C11, C17, or C23.

timegm, which tzcode implemented in 1989, will finally be
standardized 34 years later as part of C23, so timegm is now
supported even if STD_INSPIRED is not defined.

Fix bug in zdump's tzalloc emulation on hosts that lack tm_zone.
(Problem reported by Đoàn Trần Công Danh.)

Fix bug in zic on hosts where malloc(0) yields NULL on success.
(Problem reported by Tim McBrayer for AIX 6.1.)

Fix zic configuration to avoid linkage failures on some platforms.
(Problems reported by Gilmore Davidson and Igor Ivanov.)

Work around MS-Windows nmake incompatibility with POSIX.
(Problem reported by Manuela Friedrich.)

Port mktime and strftime to debugging platforms where accessing
uninitialized data has undefined behavior (strftime problem
reported by Robert Elz).

Check more carefully for unlikely integer overflows, preferring
C23 <stdckdint.h> to overflow checking by hand, as the latter has
had obscure bugs.

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Fix the escape used for em dash

ok wiz@

Remove comma after last Nm entry
Remove whitespace at the end of a line

Remove workaround for ancient HTML generation code.

Sync with tzcode2014h

merge tzcode2014f via patch

Sort SEE ALSO, add a serial comma.

Provide a re-entrant and thread-safe set of timezone API's that
don't require locking and can operate on user-specified timezones
as opposed to having to alter the environment to change a timezone.
T

Provide a re-entrant and thread-safe set of timezone API's that
don't require locking and can operate on user-specified timezones
as opposed to having to alter the environment to change a timezone.
This work was presented to the tzcode folks and it was generally
accepted, but there seems to be a lot of inertia.

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Import tzcode2009k.
- now understands 64bit time_t and 64bit data in timezone files.
- localtime(), gmtime(), asctime() and ctime() may now fail with
a NULL result if time_t cannot be represented b

Import tzcode2009k.
- now understands 64bit time_t and 64bit data in timezone files.
- localtime(), gmtime(), asctime() and ctime() may now fail with
a NULL result if time_t cannot be represented by struct tm.

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Add missing quotes.

Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

New sentence, new line. From Robert Elz.

Generate <>& symbolically.

No need for <sys/types.h>.

Add a LIBRARY section.

mdoc'ify. With a tip of the hat to kleink.

sync with tzcode1998a

Sync with tzcode1997e

sync with tzcode96l

merge in changes from 1.1 release branch

Removed "new" from references to newctime(3).
Removed -lz from SYNOPSIS.

Add NetBSD Id's.

New time and date code from ADO