Add an entry for Kurt Lidl in the "In Memoriam" section.

Obtained from:	https://www.freebsdfoundation.org/blog/in-memory-of-kurt-lidl/

en_US.ISO8859-1/articles/contributors/contrib.develinmemoriam.xml

@@ -3,6 +3,31 @@
 <itemizedlist xmlns="http://docbook.org/ns/docbook"
   xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
 
+  <listitem>
+    <para>Kurt Lidl (2015 - 2019; RIP 2019)</para>
+
+    <para>Kurt first got involved with BSD while it was still a
+      project at the University of California at Berkeley.  Shortly
+      after personalized license plates became available in Maryland,
+      he got "BSDWZRD".</para>
+
+    <para>He began contributing to FreeBSD shortly after the
+      conception of the project.  He became a FreeBSD source committer
+      in October 2015.</para>
+
+    <para>Kurt's most well known FreeBSD project was
+      &man.blacklistd.8; which blocks and releases ports on demand to
+      avoid DoS abuse.  He has also made many other bug fixes and
+      enhancements to DTrace, boot loaders, and other bits and pieces
+      of the FreeBSD infrastructure.</para>
+
+    <para>Earlier work included the game XTank, an author on RFC 2516
+      <link xlink:href="https://tools.ietf.org/html/rfc2516">"A Method
+	for Transmitting PPP Over Ethernet (PPPoE)"</link>, and the
+      USENIX paper <link
+	xlink:href="https://www.usenix.org/conference/usenix-winter-1994-technical-conference/drinking-firehose-multicast-usenet-news">"Drinking from the Firehose: Multicast USENET News"</link>.</para>
+  </listitem>
+
   <listitem>
     <para>Frank Durda IV (1995 - 2003; RIP 2018)</para>