Dev: doc: Add help info for crm sbd sublevel

doc/crm.8.adoc

@@ -1,5 +1,5 @@
 :man source:   crm
-:man version:  4.6.0
+:man version:  5.0.0
 :man manual:   crmsh documentation
 
 crm(8)
@@ -2012,6 +2012,71 @@ Example:
 utilization xen1 set memory 4096
 ...............
 
+[[cmdhelp_sbd,SBD management]]
+=== `sbd` - SBD management
+
+This level is for managing the SBD (STONITH Block Device) daemon.
+
+[[cmdhelp_sbd_configure,configure SBD]]
+==== `configure`
+
+Configure the SBD daemon for both disk-based and disk-less mode.
+
+Main functionailities include:
+- Show configured disk metadata
+- Show contents of /etc/sysconfig/sbd
+- Show SBD related cluster properties
+- Newly setup SBD configuration on a running cluster
+- Update the existing parameters
+- Add more devices to the existing disk-based SBD configuration
+
+For more details on SBD and related parameters, please see man sbd(8).
+
+Usage:
+...............
+# For disk-based SBD
+crm sbd configure show [disk_metadata|sysconfig|property]
+crm sbd configure [device=<dev>]... [watchdog-device=<dev>] [watchdog-timeout=<integer>] [allocate-timeout=<integer>] [loop-timeout=<integer>] [msgwait-timeout=<integer>]
+
+# For disk-less SBD
+crm sbd configure show [sysconfig|property]
+crm sbd configure device="" [watchdog-device=<dev>] [watchdog-timeout=<integer>]
+...............
+
+example:
+...............
+configure show
+configure show disk_metadata
+configure show sysconfig
+configure show property
+configure device="/dev/sdb1;/dev/sdb2"
+configure device=/dev/sdb1 device=/dev/sdb2
+configure device=/dev/sdb1 watchdog-timeout=30 msgwait-timeout=60
+configure device="" watchdog-timeout=30
+...............
+
+[[cmdhelp_sbd_status,show SBD status]]
+==== `status`
+
+Show the status of the SBD daemon.
+
+Usage:
+...............
+status
+...............
+
+[[cmdhelp_sbd_remove,remove SBD configuration]]
+==== `remove`
+
+Remove part of devices from the SBD configuration, or remove SBD
+service from the cluster.
+
+Usage:
+...............
+remove
+remove [<device> ...]
+...............
+
 [[cmdhelp_node,Node management]]
 === `node` - Node management