Add criptolayer.net DNS seeders

Summary: Add mainnet and testnet3 DNS seeders from criptolayer.net

Test Plan:
Verify service, e.g.
$ dig seeder.criptolayer.net
$ dig testnet-seeder.criptolayer.net

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D390

src/chainparams.cpp

@@ -182,6 +182,9 @@ class CMainParams : public CChainParams {
         // Amaury SÉCHET
         vSeeds.push_back(
             CDNSSeedData("deadalnix.me", "seed.deadalnix.me", true));
+        // criptolayer.net
+        vSeeds.push_back(
+            CDNSSeedData("criptolayer.net", "seeder.criptolayer.net", true));
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1, 0);
         base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1, 5);
@@ -336,6 +339,9 @@ class CTestNetParams : public CChainParams {
         // Amaury SÉCHET
         vSeeds.push_back(
             CDNSSeedData("deadalnix.me", "testnet-seed.deadalnix.me", true));
+        // criptolayer.net
+        vSeeds.push_back(CDNSSeedData("criptolayer.net",
+                                      "testnet-seeder.criptolayer.net", true));
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1, 111);
         base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1, 196);