drop-factory-zone-discrimination.patch

diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index 9def318..91b1847 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -4845,19 +4845,6 @@ pg_timezone_names(PG_FUNCTION_ARGS)
 						 &tzoff, &tm, &fsec, &tzn, tz) != 0)
 			continue;			/* ignore if conversion fails */
 
-		/*
-		 * Ignore zic's rather silly "Factory" time zone.  The long string
-		 * about "see zic manual page" is used in tzdata versions before
-		 * 2016g; we can drop it someday when we're pretty sure no such data
-		 * exists in the wild on platforms using --with-system-tzdata.  In
-		 * 2016g and later, the time zone abbreviation "-00" is used for
-		 * "Factory" as well as some invalid cases, all of which we can
-		 * reasonably omit from the pg_timezone_names view.
-		 */
-		if (tzn && (strcmp(tzn, "-00") == 0 ||
-					strcmp(tzn, "Local time zone must be set--see zic manual page") == 0))
-			continue;
-
 		/* Found a displayable zone */
 		break;
 	}
diff --git a/src/bin/initdb/findtimezone.c b/src/bin/initdb/findtimezone.c
index f91fd31..fc86ff0 100644
--- a/src/bin/initdb/findtimezone.c
+++ b/src/bin/initdb/findtimezone.c
@@ -413,12 +413,7 @@ identify_system_timezone(void)
 							 &tt,
 							 &bestscore, resultbuf);
 	if (bestscore > 0)
-	{
-		/* Ignore IANA's rather silly "Factory" zone; use GMT instead */
-		if (strcmp(resultbuf, "Factory") == 0)
-			return NULL;
 		return resultbuf;
-	}
 
 	/*
 	 * Couldn't find a match in the database, so next we try constructed zone