Description of problem:
gluster volume set help does not show full help.
root@Dagobah:~# gluster volume set help
Option: cluster.self-heal-window-size
Default Value: 1
Description: Maximum number blocks per file for which self-heal process would be applied simultaneously.

Option: cluster.data-self-heal-algorithm
Default Value: 
Description: Select between "full", "diff". The "full" algorithm copies the entire file from source to sink. The "diff" algorithm copies to sink only those blocks whose checksums don't match with those of source.

Option: cluster.stripe-block-size
Default Value: 128KB
Description: Size of the stripe unit that would be read from or written to the striped servers.

Option: diagnostics.brick-log-level
Default Value: INFO
Description: Changes the log-level of the bricks

Option: diagnostics.client-log-level
Default Value: INFO
Description: Changes the log-level of the clients

Option: diagnostics.brick-sys-log-level
Default Value: CRITICAL
Description: Gluster's syslog log-level

Option: diagnostics.client-sys-log-level
Default Value: CRITICAL
Description: Gluster's syslog log-level

Option: perfor
root@Dagobah:~#