add http api

vendor/github.com/ugorji/go/codec/codecgen.go

@@ -0,0 +1,13 @@
+// +build codecgen generated
+
+package codec
+
+// this file is here, to set the codecgen variable to true
+// when the build tag codecgen is set.
+//
+// this allows us do specific things e.g. skip missing fields tests,
+// when running in codecgen mode.
+
+func init() {
+	codecgen = true
+}