Update some web links.
* tz-link.htm: Mention zeitverschiebung.net (thanks to Martin
Jaeger) and the timezone-olson Haskell package.  Remove moribund
link to daylight-savings-time.info.
* NEWS: Document this.
diff --git a/NEWS b/NEWS
index f39658a..004c210 100644
--- a/NEWS
+++ b/NEWS
@@ -40,6 +40,12 @@ Unreleased, experimental changes
       Mention Maggiolo's map of solar vs standard time.
       (Thanks to Arthur David Olson.)

+      Mention the timezone-olson Haskell package.
+
+      Mention zeitverschiebung.net.  (Thanks to Martin Jaeger.)
+
+      Remove moribund link to daylight-savings-time.info.
+
       Update two links.  (Thanks to Oscar van Vlijmen.)

       Fix some formatting glitches, e.g., remove random newlines from
diff --git a/tz-link.htm b/tz-link.htm
index 596a82a..260d97c 100644
--- a/tz-link.htm
+++ b/tz-link.htm
@@ -8,7 +8,7 @@
 <meta http-equiv="Content-type" content='text/html; charset="US-ASCII"'>
 <meta name="DC.Creator" content="Eggert, Paul">
 <meta name="DC.Contributor" content="Olson, Arthur David">
-<meta name="DC.Date" content="2014-02-02">
+<meta name="DC.Date" content="2014-02-19">
 <meta name="DC.Description"
  content="Sources of information about time zones and daylight saving time">
 <meta name="DC.Identifier"
@@ -179,9 +179,8 @@ Time Zones</a> lets you sort zone names and convert times.</li>
 <li><a href="http://permatime.com/">Permatime</a> generates and views
 links that refer to a particular point in time and can be displayed in
 multiple timezones.</li>
-<li><a href="http://daylight-savings-time.info/">Daylight Saving Time info</a>
-shows a graph of time
-difference versus time for any pair of locations.</li>
+<li><a href="http://www.zeitverschiebung.net/en/">Time Difference</a>
+calculates the current time difference between locations.</li>
 <li><a href="http://worldtime.io/">worldtime.io</a>
 also contains data about time zone boundaries; it supports queries via place
 names and shows location maps.</li>
@@ -332,6 +331,10 @@ converts <code><abbr>tz</abbr></code> binary data into
 <abbr>JSON</abbr>-format data suitable for use
 in its JavaScript library for time zone conversion. Dates before 1970
 are not supported.</li>
+<li>The <a
+href="http://hackage.haskell.org/package/timezone-olson">timezone-olson</a>
+package contains <a href="http://haskell.org">Haskell</a> code that
+parses and uses <code><abbr>tz</abbr></code> binary data.</li>
 </ul>
 <h2>Other <code><abbr>tz</abbr></code>-based time zone software</h2>
 <ul>
