Make sure to dispose mime4j messages once used (JDKIM-18).
Thanks to Ben Aldrich for reporting. Implemented using a verbose dispose method instead of relying on finalizers.

git-svn-id: https://svn.apache.org/repos/asf/james/jdkim/trunk@988447 13f79535-47bb-0310-9956-ffa450edef68
3 files changed