Utility to generate the seeds.txt list that is compiled into the client (see src/chainparamsseeds.h and other utilities in contrib/seeds).
The seeds compiled into the release are created from sipa's DNS seed data, like this:
curl -s http://bitcoin.sipa.be/seeds.txt > seeds_main.txt
python makeseeds.py < seeds_main.txt > nodes_main.txt
python generate-seeds.py . > ../../src/chainparamsseeds.h