Log Message:
Updated to version 2.15.

Relevant changes since version 2.08:
=====================================
- RandomIV in message header overrides manually-supplied -salt, as one
  would expect it should.
- Added OpenSSL compatibility
- Salt and IV generators take advantage of /dev/urandom device, if available
- Added regression test for PCBC mode
- Fixed bug reported by Joshua Brown that caused certain length
  strings to not encrypt properly if ending in a "0" character.
- Fixed Rijndael compat problems