Call gdb on self to obtain backtrace and other info and put it to logs.

It timeouts a lot. See if increasing would help.

Include IP addresses of some TLD DNS servers often used for malware. Tag
them in the database.

Disconnect from DB for the time WHOIS queries are running. And try to
die in case of timeout, since the whois_query seems not to be doing
that.

Make sure the routers that have only firewall activity aren't skipped
over due to complexities in the query.

Don't think you're online unless you get a confirmation from the server.

Use sanity() instead of several cases of assert(), die() or abort().

Similar to assert, but with a message and not possible to exclude from
compilation. This is better for checking outputs, for example.

Since it signals broken message by returning NULL, not by calling die
directly.

The index is received from the server. We would be in far deeper trouble
if someone could impersonate our server than to crash the client, but it
should be fixed anyway.

Don't crash, but handle it gracefully. This is, however, only
testing/example code, so there was no impact on production in this bug.

Everything worked fine with default declaration, but it produced a
warning and it is a really awful way to do it.

Such situation happens regularly, so don't complain loudly about it.

They need to be structured differently so it is possible to create them
easily with the macros.

It is pointer to a function returning pointer, not declaration of a
function returning pointer. How on Earth was it possible to assign to it
is a mystery.

And include forgotten file in git.