Add notes about 2018e tzdata

diff --git a/releases/11/beta/11beta2.md b/releases/11/beta/11beta2.md
index 37dba2244760e101d803ce1c7eb8452992395d2e..2e804912337a3bf2e60dcf824883cc5595dd26be 100644 (file)
--- a/releases/11/beta/11beta2.md
+++ b/releases/11/beta/11beta2.md
@@ -29,6 +29,8 @@ There have been many bug fixes for PostgreSQL 11 reported during the Beta 1 peri
 * `pg_upgrade` now uses the "fast ALTER TABLE .. ADD COLUMN" feature with a non-NULL default
 * Add new configure flags introduced in PostgreSQL 11 to the corresponding Windows configure file
 
+This update also contains tzdata release 2018e, with updates for North Korea. The 2018e also reintroduces the negative-DST changes that were originally introduced in 2018a, which affects historical and present timestamps for Ireland (1971-), as well as historical timestamps for Namibia (1994-2017) and the former Czechoslovakia (1946-1947). If your application is storing timestamps with those timezones in the affected date ranges, we ask that you please test to ensure your applications behave as expected.
+
 Testing for Bugs & Compatibility
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