permit? (Irc::Bot::Auth::PermissionSet)

    # File lib/rbot/botuser.rb, line 181
          def permit?(str)
            cmd = str.to_irc_auth_command
            # TODO user-configurable list of always-allowed commands,
            # for admins that want to set permissions -* for everybody
            return true if cmd.command == :login
            allow = nil
            cmd.path.reverse.each { |k|
              if @perm.has_key?(k)
                allow = @perm[k]
                break
              end
            }
            return allow
          end