Implement proper time zone support

Cosmopolitan now supports 104 time zones. They're embedded inside any
binary that links the localtime() function. Doing so adds about 100kb
to the binary size. This change also gets time zones working properly
on Windows for the first time. It's not needed to have /etc/localtime
exist on Windows, since we can get this information from WIN32. We're
also now updated to the latest version of Paul Eggert's TZ library.

libc/calls/clock_getres.c

@@ -23,7 +23,7 @@
 #include "libc/intrin/strace.internal.h"
 #include "libc/sysv/consts/clock.h"
 #include "libc/sysv/errfuns.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 static int sys_clock_getres_poly(int clock, struct timespec *ts, int64_t real,
                                  int64_t real_coarse, int64_t boot) {

libc/calls/futimesat.c

@@ -0,0 +1,40 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/struct/timespec.h"
+#include "libc/calls/struct/timeval.h"
+
+/**
+ * Changes last accessed/modified times on file.
+ *
+ * @param times is access/modified and NULL means now
+ * @return 0 on success or -1 w/ errno
+ * @see utimensat() which uses nanos
+ */
+int futimesat(int dirfd, const char *pathname, const struct timeval tv[2]) {
+  struct timespec ts[2];
+  if (tv) {
+    ts[0].tv_sec = tv[0].tv_sec;
+    ts[0].tv_nsec = tv[0].tv_usec * 1000;
+    ts[1].tv_sec = tv[1].tv_sec;
+    ts[1].tv_nsec = tv[1].tv_usec * 1000;
+    return utimensat(dirfd, pathname, ts, 0);
+  } else {
+    return utimensat(dirfd, pathname, NULL, 0);
+  }
+}

libc/calls/gettimeofday.c

@@ -19,7 +19,7 @@
 #include "libc/calls/struct/timespec.h"
 #include "libc/calls/struct/timeval.h"
 #include "libc/sysv/consts/clock.h"
-#include "libc/time/struct/timezone.h"
+#include "libc/time.h"
 
 /**
  * Returns system wall time in microseconds, e.g.

libc/calls/settimeofday.c

@@ -22,7 +22,7 @@
 #include "libc/dce.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/sysv/errfuns.h"
-#include "libc/time/struct/timezone.h"
+#include "libc/time.h"
 
 /**
  * Changes time.

libc/calls/sleep.c

@@ -24,7 +24,7 @@
 #include "libc/sysv/consts/clock.h"
 #include "libc/thread/posixthread.internal.h"
 #include "libc/thread/thread.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 /**
  * Sleeps for particular number of seconds.

libc/calls/stime.c

@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/timeval.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 /**
  * Changes time, the old fashioned way.

libc/calls/struct/timeval.h

@@ -1,7 +1,7 @@
 #ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_TIMEVAL_H_
 #define COSMOPOLITAN_LIBC_CALLS_STRUCT_TIMEVAL_H_
 #include "libc/calls/struct/timespec.h"
-#include "libc/time/struct/timezone.h"
+#include "libc/time.h"
 COSMOPOLITAN_C_START_
 
 struct timeval {

libc/calls/struct/timeval.internal.h

@@ -2,7 +2,7 @@
 #define COSMOPOLITAN_LIBC_CALLS_STRUCT_TIMEVAL_INTERNAL_H_
 #include "libc/calls/struct/timeval.h"
 #include "libc/mem/alloca.h"
-#include "libc/time/struct/timezone.h"
+#include "libc/time.h"
 COSMOPOLITAN_C_START_
 
 int sys_settimeofday(const struct timeval *, const struct timezone *);

libc/calls/time.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/time/time.h"
+#include "libc/time.h"
 #include "libc/calls/struct/timeval.h"
 #include "libc/dce.h"
 #include "libc/intrin/asan.internal.h"

libc/calls/timespec_get.c

@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/timespec.h"
 #include "libc/sysv/consts/clock.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 /**
  * Returns high-precision timestamp, the C11 way.

libc/calls/timespec_getres.c

@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/timespec.h"
 #include "libc/sysv/consts/clock.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 /**
  * Returns high-precision timestamp granularity, the C23 way.

libc/calls/usleep.c

@@ -21,7 +21,7 @@
 #include "libc/sysv/consts/clock.h"
 #include "libc/sysv/consts/utime.h"
 #include "libc/sysv/errfuns.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 /**
  * Sleeps for particular number of microseconds.

libc/calls/utime.c

@@ -16,8 +16,8 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/utime.h"
 #include "libc/calls/struct/timeval.h"
-#include "libc/time/struct/utimbuf.h"
 
 /**
  * Changes last accessed/modified times on file.

libc/calls/utimensat-nt.c

@@ -33,7 +33,7 @@
 #include "libc/sysv/consts/at.h"
 #include "libc/sysv/consts/utime.h"
 #include "libc/sysv/errfuns.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 static textwindows int sys_utimensat_nt_impl(int dirfd, const char *path,
                                              const struct timespec ts[2],

libc/calls/utimensat-sysv.c

@@ -24,7 +24,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/runtime/zipos.internal.h"
 #include "libc/sysv/consts/at.h"
-#include "libc/time/time.h"
+#include "libc/time.h"
 
 int sys_utimensat(int dirfd, const char *path, const struct timespec ts[2],
                   int flags) {