issues.dbk: ipsec-tools and racoon are removed

Thanks to Noah Meyerhans and Andrei POPESCU
Closes: #927092

en/issues.dbk

@@ -265,6 +265,24 @@ $ sudo update-initramfs -u
             is not included in &releasename;.
           </para>
         </listitem>
+        <listitem>
+          <para>
+            <systemitem role="package">ipsec-tools</systemitem> and <systemitem
+            role="package">racoon</systemitem> have been removed from buster as
+            their source has been lagging behind in adapting to new threats.
+          </para>
+          <para>
+            Users are encouraged to migrate to <systemitem
+            role="package">libreswan</systemitem>, which has broader protocol
+            compatibility and is being actively maintained upstream.
+          </para>
+          <para>
+            <systemitem role="package">libreswan</systemitem> should be fully
+            compatible in terms of communication protocols since it implements
+            a superset of <systemitem role="package">racoon</systemitem>'s
+            supported protocols.
+          </para>
+        </listitem>
       </itemizedlist>
     </para>
   </section>