Index: build/options/WITH_ZONEINFO_LEAPSECONDS_SUPPORT
===================================================================
--- build/options/WITH_ZONEINFO_LEAPSECONDS_SUPPORT
+++ build/options/WITH_ZONEINFO_LEAPSECONDS_SUPPORT
@@ -1,2 +1,8 @@
 .\" $FreeBSD$
 Set to build leapsecond information in to the timezone database.
+.Pp
+This option violates
+.St -p1003.1
+and all other applicable standards, and is known to cause unexpected
+issues with date/time handling in many applications and programming
+languages.