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1b1ed1a
(Get the code!)
The fix that's been applied for bug #974509 checks for the presence of a redirector by looking of three hostnames, and treating as invalid any results pointing to a matching address:
- does-not-
- example.invalid.
- a random, unqualified 32-character alphanumeric hostname.
The last of these carries a small but non-zero risk of colliding with a real hostname, and there's a small but non-zero risk that this host points to the same address as something we care about. If possible, it would be better to not include this random-host lookup in the algorithm, as somewhere, some day, chances are there will eventually be a collision, causing an incomprehensible and unreproducible failure for a user.