dncp_io: Removed Linux-ism (s6_addr32), and including hncp.h first so it can work-around platform brokenness when it includes hnetd.h.
dncp_io: Removed Linux-ism (s6_addr32), and including hncp.h first so it can work-around platform brokenness when it includes hnetd.h.

sbyx/hnetd,sbyx/hnetd,sbyx/hnetd,sbyx/hnetd,sbyx/hnetd