Replace several direct config accesses in filter.inc
Major overhauls done in: * filter_generate_gateways(0 * filter_get_vpns_list() * filter_generate_optcfg_arry() * filter_generate_reflection_proxy() * filter_nat_rules_automatic_tonathosts() * filter_nat_rules_generate()
Replace several direct config accesses in filter.inc
Major overhauls done in: * filter_generate_gateways(0 * filter_get_vpns_list() * filter_generate_optcfg_arry() * filter_generate_reflection_proxy() * filter_nat_rules_automatic_tonathosts() * filter_nat_rules_generate()