Merge bitcoin/bitcoin#30007: chainparams: Add achow101 DNS seeder

2721d64 chainparams: Add achow101 DNS seeder (Ava Chow)

Pull request description:

  I wrote a [DNS seeder](https://github.com/achow101/dnsseedrs) and have been running it for the past 2 months now. I believe it is ready/good enough to be used as an additional DNS seeder for all of our supported public networks.

ACKs for top commit:
  laanwj:
    ACK 2721d64
  1440000bytes:
    ~~reACK https://github.com/bitcoin/bitcoin/pull/30007/commits/2721d64989c2b2114890586b7efd01ab4b062ca6~~
  mzumsande:
    ACK 2721d64
  willcl-ark:
    reACK 2721d64

Tree-SHA512: 857a6cf7dd33962f0008a89db4d6b57d3c6aa622704cdcca6ab710babeead3a2970d9a6fa190949c7bbf7cb7d006e814d6314be3d8c8180eed29013c7c1ac7e1

Author: fanquake

src/kernel/chainparams.cpp

@@ -140,6 +140,7 @@ class CMainParams : public CChainParams {
         vSeeds.emplace_back("seed.bitcoin.sprovoost.nl."); // Sjors Provoost
         vSeeds.emplace_back("dnsseed.emzy.de."); // Stephan Oeste
         vSeeds.emplace_back("seed.bitcoin.wiz.biz."); // Jason Maurice
+        vSeeds.emplace_back("seed.mainnet.achownodes.xyz."); // Ava Chow, only supports x1, x5, x9, x49, x809, x849, xd, x400, x404, x408, x448, xc08, xc48, x40c
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
         base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
@@ -246,6 +247,7 @@ class CTestNetParams : public CChainParams {
         vSeeds.emplace_back("seed.tbtc.petertodd.net.");
         vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl.");
         vSeeds.emplace_back("testnet-seed.bluematt.me."); // Just a static list of stable node(s), only supports x9
+        vSeeds.emplace_back("seed.testnet.achownodes.xyz."); // Ava Chow, only supports x1, x5, x9, x49, x809, x849, xd, x400, x404, x408, x448, xc08, xc48, x40c
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
         base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
@@ -297,6 +299,7 @@ class SigNetParams : public CChainParams {
         if (!options.challenge) {
             bin = ParseHex("512103ad5e0edad18cb1f0fc0d28a3d4f1f3e445640337489abb10404f2d1e086be430210359ef5021964fe22d6f8e05b2463c9540ce96883fe3b278760f048f5189f2e6c452ae");
             vSeeds.emplace_back("seed.signet.bitcoin.sprovoost.nl.");
+            vSeeds.emplace_back("seed.signet.achownodes.xyz."); // Ava Chow, only supports x1, x5, x9, x49, x809, x849, xd, x400, x404, x408, x448, xc08, xc48, x40c
 
             // Hardcoded nodes can be removed once there are more DNS seeds
             vSeeds.emplace_back("178.128.221.177");