#347 Shutdown broken in 3.0.6

[Ville Skyttä]

Here's a patch that fixes Shutdown on 3.0.6. When not
given a password, a NPE will be thrown in the
PasswordAuthenticator. That will be happily caught and
no error is signaled.

The patch also makes shutdown better so that it will
not mask that many unexpected exceptions.

Please apply.

[Ville Skyttä]

Shutdown fix for 3.0.6

[Scott M Stark]

Logged In: YES
user_id=175228

Duplicate of 677807