def reap!
      HotTub.logger.info "[HotTub] Reaping #{@name}!" if HotTub.log_trace?
      @mutex.synchronize do
        @_sessions.each_value do |pool|
          break if @shutdown
          pool.reap!
        end
      end
      nil
    end
def reap!
      HotTub.logger.info "[HotTub] Reaping #{@name}!" if HotTub.log_trace?
      @mutex.synchronize do
        @_sessions.each_value do |pool|
          break if @shutdown
          pool.reap!
        end
      end
      nil
    end
Remove and close extra clients