Assume South Sudan is not changing

Although we have not heard from the government of South Sudan,
for now, guess they will not change to stay in sync with Sudan.
* NEWS: Mention this.
* africa (Africa/Juba): Now a Zone, with the previous
contents of Africa/Khartoum except for the initial LMT.
* zone1970.tab (Africa/Juba): New entry.

NEWS

@@ -20,7 +20,8 @@ Unreleased, experimental changes
     at 02:00.  (Thanks to Steffen Thorsen.)
 
     Sudan will switch from +03 to +02 on 2017-11-01.
-    (Thanks to Ahmed Atyya.)
+    (Thanks to Ahmed Atyya.)  South Sudan is not switching, so
+    Africa/Juba is no longer a link to Africa/Khartoum.
 
     Turks & Caicos will switch from -04 all year to -05 with US DST on
     2018-03-11 at 03:00.  This affects UT offsets starting 2018-11-04

africa

@@ -1097,7 +1097,10 @@ Zone	Africa/Khartoum	2:10:08 -	LMT	1931
 			2:00	-	CAT
 
 # South Sudan
-Link Africa/Khartoum Africa/Juba
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone	Africa/Juba	2:06:28 -	LMT	1931
+			2:00	Sudan	CA%sT	2000 Jan 15 12:00
+			3:00	-	EAT
 
 # Swaziland
 # See Africa/Johannesburg.

zone1970.tab

@@ -316,10 +316,11 @@ RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
 SA,KW,YE	+2438+04643	Asia/Riyadh
 SB	-0932+16012	Pacific/Guadalcanal
 SC	-0440+05528	Indian/Mahe
-SD,SS	+1536+03232	Africa/Khartoum
+SD	+1536+03232	Africa/Khartoum
 SE	+5920+01803	Europe/Stockholm
 SG	+0117+10351	Asia/Singapore
 SR	+0550-05510	America/Paramaribo
+SS	+0451+03137	Africa/Juba
 SV	+1342-08912	America/El_Salvador
 SY	+3330+03618	Asia/Damascus
 TC	+2128-07108	America/Grand_Turk