Investigation - Go Routines hang in wait state with very large lists and reverse PTR

[Mzack9999]

dnsx version:

main|dev

Current Behavior:

With very large /8 and /16 network ranges reverse PTR queries causes somehow the engine to hang with all go routines in I/O wait state (might be related to missing timeout?) and no progression with -stats

Expected Behavior:

Correct termination in a reasonable amount of time within 100M of memory usage.

Steps To Reproduce:

wget https://github.com/yeahwu/Google-IP-Range/blob/master/ip_range_official.txt
dnsx -l ip_range_official.txt -ptr

Might be a sub-case of https://github.com/projectdiscovery/dnsx/issues/378