make session query/shares help menu more explicit

lib/rex/post/sql/ui/console/command_dispatcher/client.rb

@@ -134,22 +134,33 @@ module Rex
               end
 
               def cmd_query(*args)
-                @@query_opts.parse(args) do |opt, idx, val|
+                show_help = false
+                call_interactive = false
+
+                @@query_opts.parse(args) do |opt, _idx, val|
                   case opt
+                  when nil
+                    show_help = true if val == 'help'
+                    break
                   when '-h', '--help'
-                    cmd_query_help
-                    return
+                    show_help = true
+                    break
                   when '-i', '--interact'
-                    cmd_query_interactive
-                    return
+                    call_interactive = true
+                    break
                   end
                 end
 
-                if args.empty?
+                if args.empty? || show_help
                   cmd_query_help
                   return
                 end
 
+                if call_interactive
+                  cmd_query_interactive
+                  return
+                end
+
                 result = run_query(args.join(' '))
                 case result[:status]
                 when :success

lib/rex/ui/text/dispatcher_shell.rb

@@ -663,7 +663,7 @@ module DispatcherShell
       str << dispatcher.help_to_s(opts.merge({ command_width: [max_command_length, 12].max }))
     }
 
-    return str
+    return str << "For more info on a specific command, use %grn<command> -h%clr or %grnhelp <command>%clr.\n\n"
   end