NO-JIRA - Additional Development
- Added buffer of saved log messages for remote retrieval.
- Added __FILE__ and __LINE__ annotations to logs.
- Refactored dx_message_check() so it can be called multiple times with different depths.
- Separated the buffer-size-specific tests into a separate unit test executable.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1478538 13f79535-47bb-0310-9956-ffa450edef68