Set the turn pid file

src/freedombone-utils-turn

     echo 'Type=simple' >> /etc/systemd/system/turn.service
     echo 'User=matrix' >> /etc/systemd/system/turn.service
     echo "WorkingDirectory=/var/lib/turn" >> /etc/systemd/system/turn.service
-    echo "ExecStart=/usr/bin/turnserver -c /var/lib/turn/turnserver.conf" >> /etc/systemd/system/turn.service
+    echo "ExecStart=/usr/bin/turnserver -c /var/lib/turn/turnserver.conf --pidfile /var/lib/matrix/homeserver.pid" >> /etc/systemd/system/turn.service
     echo "Environment=REPORT_STATS=\"no\"" >> /etc/systemd/system/turn.service
     echo 'Restart=always' >> /etc/systemd/system/turn.service
     echo 'RestartSec=10' >> /etc/systemd/system/turn.service