Actually queries each IP address (which is good)

[bortzmeyer]

The tool queries not only every AF but also every IP address (which is right, per RFC 1034, section 4.3.2) so this patch documents it.

% ./pdig-dns-tool.py cloudflare.com 
…
===================
ns=ns3.cloudflare.com. addr=162.159.0.33, latency=6.396 ms
ns=ns3.cloudflare.com. addr=162.159.7.226, latency=6.178 ms
ns=ns3.cloudflare.com. addr=2400:cb00:2049:1::a29f:7e2, latency=6.355 ms
ns=ns3.cloudflare.com. addr=2400:cb00:2049:1::a29f:21, latency=6.704 ms
ns=ns5.cloudflare.com. addr=162.159.9.55, latency=6.356 ms
ns=ns5.cloudflare.com. addr=162.159.2.9, latency=6.200 ms
ns=ns5.cloudflare.com. addr=2400:cb00:2049:1::a29f:209, latency=6.948 ms
ns=ns5.cloudflare.com. addr=2400:cb00:2049:1::a29f:937, latency=7.175 ms
ns=ns4.cloudflare.com. addr=162.159.8.55, latency=6.369 ms
ns=ns4.cloudflare.com. addr=162.159.1.33, latency=6.101 ms
ns=ns4.cloudflare.com. addr=2400:cb00:2049:1::a29f:837, latency=6.359 ms
ns=ns4.cloudflare.com. addr=2400:cb00:2049:1::a29f:121, latency=6.405 ms
ns=ns6.cloudflare.com. addr=162.159.3.11, latency=7.302 ms
ns=ns6.cloudflare.com. addr=162.159.5.6, latency=5.969 ms
ns=ns6.cloudflare.com. addr=2400:cb00:2049:1::a29f:506, latency=6.740 ms
ns=ns6.cloudflare.com. addr=2400:cb00:2049:1::a29f:30b, latency=6.933 ms
ns=ns7.cloudflare.com. addr=162.159.4.8, latency=5.789 ms
ns=ns7.cloudflare.com. addr=162.159.6.6, latency=5.613 ms
ns=ns7.cloudflare.com. addr=2400:cb00:2049:1::a29f:606, latency=6.162 ms
ns=ns7.cloudflare.com. addr=2400:cb00:2049:1::a29f:408, latency=6.258 ms
latency: min=5.613 ms max=7.302 ms avg=6.416 ms
stdev=0.438 ms max-min=1.689 max/min=1.30 x latency variance
===================
end=Sat Feb 22 10:50:22 2025