Further improvements to httphi API (#173)

* 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

internet/pcap/capture.go

@@ -35,7 +35,7 @@ var (
 )
 
 type PacketBreakdown struct {
-	hdr  httpraw.Header
+	hdr  httpraw.HeaderV1
 	dmsg dns.Message
 	vld  lneto.Validator
 	// SubfieldLimit will limit the number of captured subfields to the value it has.

internet/pcap/capture_test.go

@@ -23,7 +23,7 @@ import (
 const httpProtocol = "HTTP/1.1"
 
 func makeHttpPayload(body string) ([]byte, error) {
-	var hdr httpraw.Header
+	var hdr httpraw.HeaderV1
 	hdr.SetProtocol(httpProtocol)
 	hdr.SetStatus("200", "OK")
 	hdr.Set("Cookie", "ABC=123")