udp://tracker.pirateparty.gr:6969/announce # duplicate of udp://tracker.coppersurfer.tk:6969/announce
udp://tracker.christianbro.pw:6969/announce # wrong DNS pointing to 127.0.0.1
udp://tracker2.christianbro.pw:6969/announce # wrong DNS pointing to 127.0.0.1
+udp://tracker.grepler.com:6969/announce # wrong DNS pointing to 0.0.0.0
+udp://tracker.martlet.tk:6969/announce # wrong DNS pointing to 127.0.0.1