sipwitch group

src/freedombone

     echo '' >> /etc/systemd/system/sipwitch.service
     echo '[Service]' >> /etc/systemd/system/sipwitch.service
     echo 'Type=simple' >> /etc/systemd/system/sipwitch.service
+    echo 'Group=sipwitch' >> /etc/systemd/system/sipwitch.service
     echo 'PIDFile=/var/run/sipwitch/pidfile' >> /etc/systemd/system/sipwitch.service
     echo 'EnvironmentFile=-/etc/conf.d/sipwitch' >> /etc/systemd/system/sipwitch.service
     echo 'EnvironmentFile=-/etc/sipwitch.conf' >> /etc/systemd/system/sipwitch.service