Merge bitcoin/bitcoin#35691: chainparams: delete my DNS seed

d908063980 chainparams: delete my DNS seed (Pieter Wuille)

Pull request description:

  I plan to shut down my DNS seed server in the future (probably after the release of 32.0), so I request it be removed from the master branch already. It has existed for almost 15 years at this point, and isn't getting much maintenance attention from me anymore.

ACKs for top commit:
  l0rinc:
    ACK d908063980
  Sjors:
    ACK d908063980
  pinheadmz:
    ACK d908063980
  janb84:
    ACK d908063980

Tree-SHA512: b3f5f0361d00557b94987a36a8557cf5c6f0ad1415d5ae6b70d64bce55f45f0a3d4c137b9509270128b1ef97b5ef0a3c67e4bbe6c669d5e4a79bd787cc7801c7

contrib/seeds/README.md

@@ -15,8 +15,7 @@ DNS seed, virtu's crawler, and asmap community AS map data. Run the following co
 from the `/contrib/seeds` directory:
 
 ```
-curl https://bitcoin.sipa.be/seeds.txt.gz | gzip -dc > seeds_main.txt
-curl https://21.ninja/seeds.txt.gz | gzip -dc >> seeds_main.txt
+curl https://21.ninja/seeds.txt.gz | gzip -dc > seeds_main.txt
 curl https://mainnet.achownodes.xyz/seeds.txt.gz | gzip -dc >> seeds_main.txt
 curl https://signet.achownodes.xyz/seeds.txt.gz | gzip -dc > seeds_signet.txt
 curl https://testnet.achownodes.xyz/seeds.txt.gz | gzip -dc > seeds_test.txt

src/kernel/chainparams.cpp

@@ -165,7 +165,6 @@ public:
         // This is fine at runtime as we'll fall back to using them as an addrfetch if they don't support the
         // service bits we want, but we should get them updated to support all service bits wanted by any
         // release ASAP to avoid it where possible.
-        vSeeds.emplace_back("seed.bitcoin.sipa.be."); // Pieter Wuille, only supports x1, x5, x9, and xd
         vSeeds.emplace_back("dnsseed.bluematt.me."); // Matt Corallo, only supports x9
         vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch."); // Jonas Schnelli, only supports x1, x5, x9, and xd
         vSeeds.emplace_back("seed.btc.petertodd.net."); // Peter Todd, only supports x1, x5, x9, and xd