Add legacy CLI commands back to the docs
Add legacy CLI commands back to the docs

Admins are trying to use the new CLI commands on older Mattermost deployments. This is causing a lot of unnecessary pain for them.

Propose we add the legacy CLI commands back until majority of deployments are running Mattermost 3.6 or later
funkyfuture/docs,funkyfuture/docs,funkyfuture/docs,funkyfuture/docs