Add testnet DNS seed of Andreas Schildbach.

[schildbach]

It runs sipas crawler, but rather than using its custom nameserver implementation it serves a generated zonefile via bind9. The zone always contains 25 IPv4 and 25 IPv6 peers. FWIW, the zone is secured using DNSSEC.

[BitcoinPullTester]

Automatic sanity-testing: PASSED, see http://jenkins.bluematt.me/pull-tester/p4862_45a4baf100d8e7392e9e26f81069d69e0115ea51/ for binaries and test log.
This test script verifies pulls every time they are updated. It, however, dies sometimes and fails to test properly. If you are waiting on a test, please check timestamps to verify that the test.log is moving at http://jenkins.bluematt.me/pull-tester/current/
Contact BlueMatt on freenode if something looks broken.

[TheBlueMatt]

ut ACK.

[petertodd]

ut ACK.

[laanwj]

ACK, tried getting addresses from the seed and connecting them, and they all work.

[petertodd]

@schildbach BTW do you have the code that does the BIND zonefile stuff up somewhere?

[schildbach]

@petertodd Yes it's here: https://github.com/schildbach/bitcoin-seeder/tree/zonefile-schildbach
Its a horrible hack, everything is hardcoded. The best I was able to do without learning C++.

[petertodd]

Ha! Awesome, thanks!