Mention Ivan Shapovalov contrib/systemd

AUTHORS.rst

@@ -35,3 +35,6 @@ Turned to Dust <dwinslow86 at gmail.com>
 
 Brabo <brabo at riseup.net>
  * Installation instruction fixes
+
+Ivan Shapovalov <intelfx100 at gmail.com>
+ * contrib/systemd: a sample systemd unit file and a logger configuration

CHANGES.rst

@@ -10,6 +10,8 @@ General:
 * Fix race in caches that occasionally caused some presence updates to be
   dropped - SYN-369.
 * Check server name has not changed on restart.
+* Add a sample systemd unit file and a logger configuration in
+  contrib/systemd. Contributed Ivan Shapovalov.
 
 Federation: