Namecoin: Use absolute FQDN for DNS seed domains
Namecoin: Use absolute FQDN for DNS seed domains

Fixes consistency with upstream Bitcoin, see commit
ca2c313aa291ae44adc1b7148ed49125bdc77bf4.

namecoin/namecore,namecoin/namecore,namecoin/namecore,namecoin/namecoin-core,namecoin/namecoin-core,namecoin/namecore,namecoin/namecore,namecoin/namecoin-core,namecoin/namecore,namecoin/namecoin-core,namecoin/namecoin-core,namecoin/namecoin-core