Fix several pre-1970 transitions in Perry Co, IN

(Thanks to Alois Treindl for pointing out the 1967/9 errors.)
* NEWS: Mention this.
* northamerica (Perry): No DST 1946/54.  1960 DST ends September,
not October.  1961 DST ends October, not September.  Switch to
CST/CDT in October 1967.  Switch to EST/EDT in April 1969 (a
two-hour switch that day).

NEWS

@@ -9,6 +9,9 @@ Unreleased, experimental changes
     Alois Treindl for pointing out that the old data entries were
     probably wrong.)
 
+    Fix several errors in pre-1970 transitions in Perry County, IN.
+    (Thanks to Alois Triendl for pointing out the 1967/9 errors.)
+
   Changes to commentary
 
     Nashville's newspapers dueled about the time of day in the 1950s.

northamerica

@@ -970,21 +970,22 @@ Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 12:09:53
 			-5:00	US	E%sT
 #
 # Perry County, Indiana, switched from eastern to central time in April 2006.
+# From Alois Triendl (2019-07-09):
+# The Indianapolis News, Friday 27 October 1967 states that Perry County
+# returned to CST.  It went again to EST on 27 April 1969, as documented by the
+# Indianapolis star of Saturday 26 April.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
-Rule Perry	1946	only	-	Apr	lastSun	2:00	1:00	D
-Rule Perry	1946	only	-	Sep	lastSun	2:00	0	S
-Rule Perry	1953	1954	-	Apr	lastSun	2:00	1:00	D
-Rule Perry	1953	1959	-	Sep	lastSun	2:00	0	S
 Rule Perry	1955	only	-	May	 1	0:00	1:00	D
+Rule Perry	1955	1960	-	Sep	lastSun	2:00	0	S
 Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
 Rule Perry	1960	only	-	Oct	lastSun	2:00	0	S
-Rule Perry	1961	only	-	Sep	lastSun	2:00	0	S
-Rule Perry	1962	1963	-	Oct	lastSun	2:00	0	S
+Rule Perry	1961	1963	-	Oct	lastSun	2:00	0	S
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 12:12:57
 			-6:00	US	C%sT	1946
 			-6:00 Perry	C%sT	1964 Apr 26  2:00
-			-5:00	-	EST	1969
+			-5:00	-	EST	1967 Oct 29  2:00
+			-6:00	US	C%sT	1969 Apr 27  2:00
 			-5:00	US	E%sT	1971
 			-5:00	-	EST	2006 Apr  2  2:00
 			-6:00	US	C%sT