Working xmix block
I’ve updated the trackback block with a block that works also against the current configuration of the xmix trackback spammer.
The ^$ is the line that blocks any trackback coming in without a user agent.
I’ve had at least one genuine trackback coming in without a user agent, so this block should probably be removed after an active spamrun.
The trackbacks kept coming, and got annoying enough I just had to come up with a solution…