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.

third_party/tz/windows.py

@@ -0,0 +1,163 @@
+# Thank you Alejandro Zeise for collecting this information
+# https://gist.github.com/alejzeis/ad5827eb14b5c22109ba652a1a267af5
+
+SUPPORTED = set((
+  'Africa/Algiers',
+  'Africa/Cairo',
+  'Africa/Johannesburg',
+  'Africa/Lagos',
+  'Africa/Nairobi',
+  'America/Anchorage',
+  'America/Argentina/Buenos_Aires',
+  'America/Bogota',
+  'America/Chicago',
+  'America/Denver',
+  'America/Lima',
+  'America/Los_Angeles',
+  'America/Mexico_City',
+  'America/New_York',
+  'America/Phoenix',
+  'America/Santiago',
+  'America/Sao_Paulo',
+  'Asia/Bangkok',
+  'Asia/Dhaka',
+  'Asia/Dubai',
+  'Asia/Hong_Kong',
+  'Asia/Jakarta',
+  'Asia/Jerusalem',
+  'Asia/Kabul',
+  'Asia/Karachi',
+  'Asia/Kolkata',
+  'Asia/Manila',
+  'Asia/Seoul',
+  'Asia/Shanghai',
+  'Asia/Singapore',
+  'Asia/Taipei',
+  'Asia/Tehran',
+  'Asia/Tokyo',
+  'Australia/Adelaide',
+  'Australia/Brisbane',
+  'Australia/Melbourne',
+  'Australia/Perth',
+  'Australia/Sydney',
+  'CET',
+  'CST6CDT',
+  'EET',
+  'EST',
+  'EST5EDT',
+  'Etc/GMT',
+  'Etc/GMT+1',
+  'Etc/GMT+10',
+  'Etc/GMT+11',
+  'Etc/GMT+12',
+  'Etc/GMT+2',
+  'Etc/GMT+3',
+  'Etc/GMT+4',
+  'Etc/GMT+5',
+  'Etc/GMT+6',
+  'Etc/GMT+7',
+  'Etc/GMT+8',
+  'Etc/GMT+9',
+  'Etc/GMT-1',
+  'Etc/GMT-10',
+  'Etc/GMT-11',
+  'Etc/GMT-12',
+  'Etc/GMT-13',
+  'Etc/GMT-14',
+  'Etc/GMT-2',
+  'Etc/GMT-3',
+  'Etc/GMT-4',
+  'Etc/GMT-5',
+  'Etc/GMT-6',
+  'Etc/GMT-7',
+  'Etc/GMT-8',
+  'Etc/GMT-9',
+  'Etc/UTC',
+  'Europe/Berlin',
+  'Europe/Brussels',
+  'Europe/Budapest',
+  'Europe/Dublin',
+  'Europe/Istanbul',
+  'Europe/Kyiv',
+  'Europe/London',
+  'Europe/Madrid',
+  'Europe/Moscow',
+  'Europe/Paris',
+  'Europe/Prague',
+  'Europe/Rome',
+  'Europe/Vienna',
+  'Europe/Warsaw',
+  'Europe/Zurich',
+  'GMT',
+  'HST',
+  'MET',
+  'MST',
+  'MST7MDT',
+  'PST8PDT',
+  'Pacific/Auckland',
+  'Pacific/Fiji',
+  'Pacific/Guam',
+  'Pacific/Honolulu',
+  'Pacific/Port_Moresby',
+  'WET',
+))
+
+import re
+import os
+import subprocess
+
+NAMES = set()
+ZONES = set()
+SUPERFLUOUS = set()
+TABLE1 = []
+TABLE2 = []
+
+with open("/home/jart/scratch/windows-timezone-mappings.csv") as f:
+  for line in f:
+    line = line.strip()
+    if not line:
+      break
+    name, what, zone = line.split(',')
+    if name in NAMES:
+      continue
+    ZZ = zone.split()  # has superfluous zones
+    ZZ = [z for z in ZZ if z in SUPPORTED] + [z for z in ZZ if z not in SUPPORTED]
+    zone = ZZ[0]
+    rest = ZZ[1:]
+    NAMES.add(name)
+    ZONES.add(ZZ[0])
+    SUPERFLUOUS |= set(rest)
+    os.environ['TZ'] = zone
+    p = subprocess.Popen(['date', '+%z@%Z'], stdout=subprocess.PIPE)
+    z, Z = p.stdout.read().decode('utf-8').strip().split('@')
+    print("%-35s %-5s %-10s %-10s %-30s" % (name, what, z, Z, zone))
+    if zone in SUPPORTED:
+      TABLE1.append((name, zone, z, Z))
+    else:
+      TABLE2.append((name, zone, z, Z))
+
+print()
+TABLE1.sort()
+TABLE2.sort()
+for k, v, z, Z in TABLE1:
+  print('{"%s", "%s"}, // %s %s' % (k, v, z, Z))
+print('#ifdef EMBED_EVERY_TIME_ZONE')
+for k, v, z, Z in TABLE2:
+  print('{"%s", "%s"}, // %s %s' % (k, v, z, Z))
+print('#endif')
+
+# print()
+# TABLE.sort(key=lambda x: (int(x[2]), x[1]))
+# for k, v, z, Z in TABLE:
+#   if re.search(r'[A-Z]', Z):
+#     Z = ' ' + Z
+#   else:
+#     Z = ''
+#   print('__static_yoink("usr/share/zoneinfo/%s"); // %s%s (%s)' % (v, z, Z, k))
+# print('#ifdef EMBED_EVERY_TIME_ZONE')
+# print('#endif')
+
+# print()
+# SUPERFLUOUS -= ZONES
+# for z in SUPERFLUOUS:
+#   print(z)