Fix masscan redis-queue output

[peding]

Sometimes the masscan output redis related error like redis: unexpected response from redis server: :301nd. This is caused by that masscan sends more request to redis than it reads, which will cause it to read wrong response when it exits (it expects to get response from QUIT command but gets something else).

Probeably.

[peding]

I might have smoking weed when I wrote this, doesn't make sense when I look at the masscan source 🤔