doc: Add new DNSseed policy
doc: Add new DNSseed policy

(cherry picked from commit 0a0878d43a2e7db9c41b20ba1d3eb714fd6806c4)

reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin