rl-1909: brief package version changes

(cherry picked from commit f853bb4)

nixos/doc/manual/release-notes/rl-1909.xml

@@ -3,7 +3,7 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="sec-release-19.09">
- <title>Release 19.09 (“Loris”, 2019/09/??)</title>
+ <title>Release 19.09 (“Loris”, 2019/10/09)</title>
 
  <section xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
@@ -23,6 +23,26 @@
      End of support is planned for end of April 2020, handing over to 20.03.
     </para>
    </listitem>
+   <listitem>
+    <para>
+     Nix has been updated to 2.3; see its
+     <link xlink:href="https://nixos.org/nix/manual/#ssec-relnotes-2.3">release
+     notes</link>.
+    </para>
+   </listitem>
+   <listitem>
+    <para>Core version changes:</para>
+    <para>systemd: 239 -&gt; 243</para>
+    <para>gcc: 7 -&gt; 8</para>
+    <para>glibc: 2.27 (unchanged)</para>
+    <para>linux: 4.19 LTS (unchanged)</para>
+    <para>openssl: 1.0 -&gt; 1.1</para>
+   </listitem>
+   <listitem>
+    <para>Desktop version changes:</para>
+    <para>plasma5: 5.14 -&gt; 5.16</para>
+    <para>gnome3: 3.30 -&gt; 3.32</para>
+   </listitem>
    <listitem>
     <para>
      PHP now defaults to PHP 7.3, updated from 7.2.