* httphi: RouterConfig refactor to enable DefaultRouterConfig
* RequestHeader not case sensitive anymore
* httphi: use DefaultRouterConfig in examples
* httphi: remove gated stage complexity
Misusing Stage methods by calling them once header has been written is totally harmless as far as I can tell. We simplify the codebase on this occasion by removing the headerWritten check for all stage methods
* httphi: improve APIs
* httphi: remove status
* add Exchange.WriteBodyString
* Mux.MaxPathValues and other improvements
* Mux PathValue improvemnt and fixes
* MuxSlice more method muxing improvements
* diagram out interesting approach to form parsing for clanker
* refactor RequestParseForm and achieve greatness in API design
* explicit naming of headerCapacityKV value in kvBuffer.Reset
* fix Mux bug not matching paths correctly; httpraw HTTP V1 naming applied
* rename many examples,use httphi in examples,remove useless maxAwaitingConn field
* add ipv4.String
* add ipv4 UnspecifiedAddr and BroadcastAddr
* add ethernet.String
Pat Whittingslow