tweak net params for zdag
tweak net params for zdag

reduce delays and increase max tx in flight


Former-commit-id: c5f222811360346ba31556b702a5ec5ebf1c29f2
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin