Fix commentary in previous change

* NEWS: Put post-2022c changes into new section, where they belong.
* backzone: Add commentary pointing to resolutions.

NEWS

@@ -1,5 +1,18 @@
 News for the tz database
 
+Unreleased, experimental changes
+
+  Briefly:
+    Simplify three Ukraine zones into one.
+
+  Changes to past timestamps
+
+    Simplify three Ukraine zones to one, since the post-1970
+    differences seem to have been imaginary.  Move Europe/Uzhgorod and
+    Europe/Zaporozhye to 'backzone'; backward-compatibility links
+    still work, albeit with different timestamps before October 1991.
+
+
 Release 2022c - 2022-08-15 17:47:18 -0700
 
   Briefly:
@@ -30,7 +43,6 @@ Release 2022b - 2022-08-10 15:38:32 -0700
     Chile's DST is delayed by a week in September 2022.
     Iran no longer observes DST after 2022.
     Rename Europe/Kiev to Europe/Kyiv.
-    Simplify three Ukraine zones into one.
     New zic -R option
     Vanguard form now uses %z.
     Finish moving duplicate-since-1970 zones to 'backzone'.
@@ -47,11 +59,6 @@ Release 2022b - 2022-08-10 15:38:32 -0700
 
   Changes to past timestamps
 
-    Simplify three Ukraine zones to one, since the post-1970
-    differences seem to have been imaginary.  Move Europe/Uzhgorod and
-    Europe/Zaporozhye to 'backzone'; backward-compatibility links
-    still work, albeit with different timestamps before October 1991.
-
     Finish moving to 'backzone' the location-based zones whose
     timestamps since 1970 are duplicates; adjust links accordingly.
     This change ordinarily affects only pre-1970 timestamps, and with

backzone

@@ -1484,6 +1484,7 @@ Zone	Europe/Tiraspol	1:58:32	-	LMT	1880
 #
 # Although Shanks & Pottenger say Transcarpathia used CET 1990/1991,
 # this unreliable source contradicts contemporaneous government resolutions
+# (see the commentary for Ukraine in the 'europe' file)
 # so for now this dubious zone is in 'backzone'.
 # "Uzhhorod" is the transliteration of the Rusyn/Ukrainian pronunciation, but
 # "Uzhgorod" was a common English spelling when this dubious zone was
@@ -1526,7 +1527,8 @@ Zone	Europe/Zagreb	1:03:52	-	LMT	1884
 
 # Although Shanks & Pottenger say Zaporizhzhia and eastern Lugansk
 # observed DST 1990/1991, this unreliable source contradicts contemporaneous
-# government resolutions so for now this dubious zone is in 'backzone'.
+# government resolutions (see the commentary for Ukraine in the 'europe' file)
+# so for now this dubious zone is in 'backzone'.
 # "Zaporizhzhia" is the transliteration of the Ukrainian name, but
 # "Zaporozhye" was a common English spelling when this dubious zone was
 # added to TZDB in 1999.