seeds: add signet seeds

Author: jonatack

contrib/seeds/README.md

@@ -16,12 +16,14 @@ from the `/contrib/seeds` directory:
 
 ```
 curl https://bitcoin.sipa.be/seeds.txt.gz | gzip -dc > seeds_main.txt
-curl https://mainnet.achownodes.xyz/seeds.txt.gz | gzip -dc >> seeds_main.txt
 curl https://21.ninja/seeds.txt.gz | gzip -dc >> seeds_main.txt
 curl https://luke.dashjr.org/programs/bitcoin/files/charts/seeds.txt >> 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
 curl https://raw.githubusercontent.com/asmap/asmap-data/main/latest_asmap.dat > asmap-filled.dat
 python3 makeseeds.py -a asmap-filled.dat -s seeds_main.txt > nodes_main.txt
+python3 makeseeds.py -a asmap-filled.dat -s seeds_signet.txt -m 237800 > nodes_signet.txt
 python3 makeseeds.py -a asmap-filled.dat -s seeds_test.txt > nodes_test.txt
 # TODO: Uncomment when a seeder publishes seeds.txt.gz for testnet4
 # python3 makeseeds.py -a asmap-filled.dat -s seeds_testnet4.txt -m 30000 > nodes_testnet4.txt