Refresh correlation data and update copyright year

Just a basic correlation update based on more recent active METAR
station and WX zone lists. Also update the copyright year for files
which have been edited so far in 2021 as well as in the LICENSE
file.

zlist

@@ -2,7 +2,7 @@
 # use, copy, modify, and distribute this software is granted under terms
 # provided in the LICENSE file distributed with this software.
 #
-# generated on 2021-08-29 by running:
+# generated on 2021-11-23 by running:
 #
 # for area in $(
 #  wget -qO- https://tgftp.nws.noaa.gov/data/forecasts/zone/ \
@@ -360,27 +360,46 @@ caz112
 caz113
 caz114
 caz115
-caz179
-caz180
-caz181
-caz182
-caz183
-caz184
-caz185
-caz186
-caz187
-caz188
-caz189
-caz190
-caz191
-caz192
-caz193
-caz194
-caz195
-caz196
-caz197
-caz198
-caz199
+caz300
+caz301
+caz302
+caz303
+caz304
+caz305
+caz306
+caz307
+caz308
+caz309
+caz310
+caz311
+caz312
+caz313
+caz314
+caz315
+caz316
+caz317
+caz318
+caz319
+caz320
+caz321
+caz322
+caz323
+caz324
+caz325
+caz326
+caz327
+caz328
+caz329
+caz330
+caz331
+caz332
+caz333
+caz334
+caz335
+caz336
+caz337
+caz338
+caz339
 caz505
 caz506
 caz507
@@ -3553,11 +3572,13 @@ waz038
 waz039
 waz040
 waz041
-waz042
 waz043
 waz044
 waz045
 waz046
+waz047
+waz048
+waz049
 waz503
 waz504
 waz506