doco how to modify the osg-token-renewer timer frequency (SOFTWARE-5156)

Author: edquist

docs/other/osg-token-renewer.md

@@ -122,6 +122,24 @@ account = myclient1234
 token_path = /etc/osg/tokens/myclient1234.mytoken567.token
 ```
 
+### Adjusting token renewal frequency
+
+It is possible to override the default `osg-token-renewer` systemd timer
+frequency for this service by creating a config override file under
+`/etc/systemd/system/osg-token-renewer.timer.d/`.
+
+For example, to configure the token renewal service to run every 10 minutes,
+run the following:
+
+```console
+root@host # cat << EOF > /etc/systemd/system/osg-token-renewer.timer.d/timer-frequency.conf
+[Timer]
+OnBootSec=10min
+OnUnitActiveSec=10min
+EOF
+root@host # systemctl daemon-reload
+```
+
 Managing the OSG Token Renewal Service
 --------------------------------------