+`console:` `(applet | html5 | vv)` ::
+
+Select the default Console viewer. You can either use the builtin java
+applet (VNC), an external virt-viewer comtatible application (SPICE), or an
+HTML5 based viewer (noVNC).
+
+`email_from:` `string` ::
+
+Specify email address to send notification from (default is root@$hostname)
+
+`fencing:` `(both | hardware | watchdog)` (default=`watchdog`)::
+
+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
+
+`http_proxy:` `http://.*` ::
+
+Specify external http proxy which is used for downloads (example:
+'http://username:password@host:port/')
+
+`keyboard:` `(da | de | de-ch | en-gb | en-us | es | fi | fr | fr-be | fr-ca | fr-ch | hu | is | it | ja | lt | mk | nl | no | pl | pt | pt-br | sl | sv | tr)` ::
+
+Default keybord layout for vnc server.
+
+`language:` `(de | en)` ::
+
+Default GUI language.
+
+`max_workers:` `integer (1 - N)` ::
+
+Defines how many workers (per node) are maximal started on actions like
+'stopall VMs' or task from the ha-manager.
+
+`migration_unsecure:` `boolean` ::
+
+Migration is secure using SSH tunnel by default. For secure private
+networks you can disable it to speed up migration.
+