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

[D. Hugh Redelmeier]

New commits:
commit 539394fa1d5fe85d7b7acc6cd5369d73fcdccc8d
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Sun Apr 20 22:44:24 2014 -0400

    - simplify sign_hash.  Improve aptness of diagnostics.
    
    - add comment to RSA_sign_hash to say it returns 0 on failure
    
    - check the result of sign_hash to make sure it is correct
      (0 for error, or expected length).
    
    Untested.