Set the fencing mode of the HA cluster. Hardware mode needs a valid
configuration of fence devices in /etc/pve/ha/fence.cfg. With both all two
-modes are used. NOTE: 'hardware' and 'both' are EXPERIMENTAL & WIP
+modes are used.
++
+WARNING: 'hardware' and 'both' are EXPERIMENTAL & WIP
`http_proxy`: `http://.*` ::