message: add timer and reactor help
diff: +define timer_list
  + if SwooleG.timer.initialized == 1
  + printf "current timer number: %d, round: %d\n", SwooleG.timer.num,SwooleG.timer->round
  + set $running = 1
  + set $i = 1
  + while $running
  + if $i < SwooleG.timer->heap->num
  + set $tmp = SwooleG.timer->heap->nodes[$i]
  + set $node = (swTimer_node *)$tmp->data
  + if $node
  + printf "\t timer[%d] exec_msec:%ld round:%ld\n", $node->id, $node->exec_msec, $node->round
  + end
  + else
  + set $running = 0
  + end
  + set $i = $i + 1
  + end
  + else
  + printf "no timer\n"
  + end
  +end
  +
  +define reactor_info
  + if SwooleG.main_reactor
  + printf "current reactor id: %d\n",SwooleG.main_reactor->id
  + printf "\t running: %d\n", SwooleG.main_reactor->running
  + printf "\t event_num: %d\n", SwooleG.main_reactor->event_num
  + printf "\t max_event_num: %d\n", SwooleG.main_reactor->max_event_num
  + printf "\t check_timer: %d\n", SwooleG.main_reactor->check_timer
  + printf "\t timeout_msec: %d\n", SwooleG.main_reactor->timeout_msec
  + end
  +end
  +
  define co_list
  call swoole_coro_iterator_reset()
  set $running = 1
  