Ohops, had missed one add_node <> create_node in refactoring effort. Sigh.
Implemented SKV <> JSPF (JSONBLOB) state sync.
Refactored TCP-related bits of scb to their own file. Now can (gracefully) add UDP related module.
Added (very) minimalist UDP support to scb.
Added minimalist mdns.lua skeleton, small TODO update.