listen_dual = s_bird_global:option(Flag, "listen_bgp_dual", "BGP Dual/ipv6", "Set if BGP connections will listen ipv6 only 'ipv6only' or both ipv4/6 'dual' routes")
listen_dual.optional = true
listen_dual = s_bird_global:option(Flag, "listen_bgp_dual", "BGP Dual/ipv6", "Set if BGP connections will listen ipv6 only 'ipv6only' or both ipv4/6 'dual' routes")
listen_dual.optional = true