foundation:

- If a outgoing address is specfied, log in debug mode which one is used.
- In case of a java.net.SocketException: Invalid argument, log an error which gives a hint that the listening hostname may be configured wrong.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3501 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534