docs: describe required ACLs for all commands

command/deployment_fail.go

@@ -21,6 +21,9 @@ Usage: nomad deployment fail [options] <deployment id>
   if the job is configured to auto revert, the job will attempt to roll back to a
   stable version.
 
+  When ACLs are enabled, this command requires a token with the 'submit-job'
+  and 'read-job' capabilities for the deployment's namespace.
+
 General Options:
 
   ` + generalOptionsUsage(usageOptsDefault) + `