Improve gathering of IP addresses

[tiaga]

trackers_all_ip.txt doesn't take into account situations when one domain is having many A records. For example:

# dig +short @1.1.1.1 open.free-tracker.ga
34.89.51.235
34.94.76.146
35.227.59.57

So, it would be useful to have all IPs in the list.

[ngosang]

That's a good idea but it will increase the load on those severs and you will get the same peers since it's the same tracker. I keep this open but I don't plan to implement it soon.