anchor.diff:  http2 (such as nginx).
   
   http2/spdy offers connection multiplexing allowing use one unique persistent
  -connection handle all required context, comptly eliminating the overhead of
  +connection handle all required context, completly eliminating the overhead of
   creating and destroyng connectons. With that you can make multiple and repeated
   http connections without performance issues.
   
  
positive.code: = POSTAL - Protocol Spec.
  Andrey Antukh, <niwi@niwi.nz>
  Version 1.0
  :toc:
  
negative.code: == Protocol Overview
  
  POSTAL is a message based protocol with messages modeled as structured messages
  encoded using `transit+json` serialization format.
  
  WARNING: this document is under design and is considered in pre-alpha state.
  
  
  === Rationale
  
  The tipical web application follows the api REST architecture, but the main
  problem of that is that is bound directly to the HTTP semantics that are not
  always coherent or not always clear how to use.
  
  The main objective of this protocol is take aside the http rest api semantics and
  build own ones on top of http protocol. Allowing build rich and powerful api's
  without any restrictions of the the REST API's.
  
  The general idea is borowed from link:https://facebook.github.io/relay/. So is
  this a ideal protocol for build a declarative queries and use this transport
  protocol for client<->server communication.
  
  It comes with a set of predefined messages with specified semantics but that not
  limits the user to define own messages on top of that protocol.
  
  
  === Messages
  