HTTP Binary headers

Signed-off-by: Fabio José <fabiojose@gmail.com>

lib/bindings/http/constants.js

@@ -6,5 +6,15 @@ module.exports = {
   MIME_CE      : "application/cloudevents",
   MIME_CE_JSON : "application/cloudevents+json",
 
-  HEADER_CONTENT_TYPE : "content-type"
+  HEADER_CONTENT_TYPE : "content-type",
+
+  BINARY_HEADERS_02 : {
+    TYPE              : "ce-type",
+    SPEC_VERSION      : "ce-specversion",
+    SOURCE            : "ce-source",
+    ID                : "ce-id",
+    TIME              : "ce-time",
+    SCHEMA_URL        : "ce-schemaurl",
+    EXTENSIONS_PREFIX : "ce-"
+  }
 }