set_auth_path (Irc::Bot::MessageTemplate)

    # File lib/rbot/messagemapper.rb, line 409
        def set_auth_path(hash)
          if hash.has_key?(:auth)
            warning "Command #{@template.inspect} in #{@botmodule} uses old :auth syntax, please upgrade"
          end
          if hash.has_key?(:full_auth_path)
            warning "Command #{@template.inspect} in #{@botmodule} sets :full_auth_path, please don't do this"
          else
            pre = @botmodule
            words = items.reject{ |x|
              x == pre || x.kind_of?(Symbol) || x =~ /\[|\]/
            }
            if words.empty?
              post = nil
            else
              post = words.first
            end
            if hash.has_key?(:auth_path)
              extra = hash[:auth_path]
              if extra.sub!(/^:/, "")
                pre += "::" + post
                post = nil
              end
              if extra.sub!(/:$/, "")
                if words.length > 1
                  post = [post,words[1]].compact.join("::")
                end
              end
              pre = nil if extra.sub!(/^!/, "")
              post = nil if extra.sub!(/!$/, "")
              extra = nil if extra.empty?
            else
              extra = nil
            end
            hash[:full_auth_path] = [pre,extra,post].compact.join("::")
            debug "Command #{@template} in #{botmodule} will use authPath #{hash[:full_auth_path]}"
            # TODO check if the full_auth_path is sane
          end
        end