message: Move Bu seeder on top of the seeder list.
  While at it synced the list used in BU with the one
  used in Classic and Core.
diff: @@ -136,10 +136,11 @@ public:
  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
  // BITCOINUNLIMITED START
  - vSeeds.push_back(CDNSSeedData("btcc.com", "seed.btcc.com")); // BTCC
  + vSeeds.push_back(CDNSSeedData("bitcoinunlimited.info", "seed.bitcoinunlimited.info", true)); // BU seeder
  vSeeds.push_back(CDNSSeedData("bitnodes.io", "seed.bitnodes.io")); // Bitnodes (Addy Yeow)
  vSeeds.push_back(CDNSSeedData("bitcoin.sipa.be", "seed.bitcoin.sipa.be", true)); // Pieter Wuille, only supports x1, x5, x9, and xd
  - vSeeds.push_back(CDNSSeedData("bitcoinunlimited.info", "seed.bitcoinunlimited.info", true)); // BU seeder
  + vSeeds.push_back(CDNSSeedData("bluematt.me", "dnsseed.bluematt.me", true));
  + vSeeds.push_back(CDNSSeedData("bitcoinstats.com", "seed.bitcoinstats.com", true)); // Christian Decker, supports x1 - xf
  vSeeds.push_back(CDNSSeedData("xf2.org", "bitseed.xf2.org")); // Jeff Garzik
  // BITCOINUNLIMITED END
  