Tagged 0.14.
Removes bitseed.xf2.org from the DNS seeder list because of the following reasons:
- #8861 (comment)
- Doesn't resolves IPv6 Address
- Almost every IPv4 address in the response doesn't react on port 8333 ( crawler [if there is any] seems to be not working)
(@cdecker, can you also check your seed.bitcoinstats.com for IPv6 support)