From debian packaging some additions to the systemd example service file

ChangeLog

@@ -26,6 +26,7 @@ Version 4.5.1.2 'dan Eider':
 		* Now we put in turn_session_info->tls_method the real TLS version.
 		  Earlier we put UNKNOWN in this field if it was a TLS protocol
 		  that was not defined supportel TLS protocol during compile time.
+	- merge PR #276 Add systemd service example (by Liberasys)
 
 02/03/2019 Oleg Moskalenko <mom040267@gmail.com> Mihály Mészáros <misi@majd.eu>
 Version 4.5.1.1 'dan Eider':

examples/etc/coturn.service

@@ -1,15 +1,24 @@
 [Unit]
-Description=coturn TURN Server
-Before=multi-user.target
-Before=graphical.target
+Description=coTURN STUN/TURN Server
+Documentation=man:coturn(1) man:turnadmin(1) man:turnserver(1)
+After=network.target
 After=network-online.target
 After=remote-fs.target
 Wants=network-online.target
 
 [Service]
-ExecStart=/usr/local/bin/turnserver
+User=turnserver
+Group=turnserver
+Type=forking
+RuntimeDirectory=turnserver
+PIDFile=/run/turnserver/turnserver.pid
+ExecStart=/usr/bin/turnserver --daemon -c /etc/turnserver.conf --pidfile /run/turnserver/turnserver.pid
+#FixMe: turnserver exit faster than it is finshing the setup and ready for handling the connection.
+ExecStartPost=/bin/sleep 2
+Restart=on-failure
+InaccessibleDirectories=/home
+PrivateTmp=yes
 
 [Install]
 WantedBy=multi-user.target
 Alias=turnserver.service
-