[Swan-commit] Changes to ref refs/heads/master

[D. Hugh Redelmeier]

New commits:
commit 2995415b24315ad492c453055e235ec8d6168724
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Thu Feb 13 03:22:10 2014 -0500

    Improve wire_chunk abstraction in pluto_crypto.h
    
    - separate the wire_arena concept from the wire_chunk.
      This helps the C type system to catch errors
      and makes the code clearer
    
    - include the space logically within the arena.
      This makes a number of parameters redundant
      leaving less opportunity for mistakes and
      confusion.
    
    - add macros to make the notation more concise.
    
    - unify functions with the same purpose
    
    - rename functions to make their purpose clearer
    
    - document the abstraction and conventions.
    
    - make the function of the union within struct pluto_crypto_req clearer.
    
    - sprinkse a few const qualifiers to clarify data flow