portsdb -uU leaves lockfiles in /tmp

[Jubal Kessler]

I run 'portsdb -uU' every night. I've just noticed that lockfiles are
being left in /tmp after each invocation. The files look like:

  /tmp/courier-authlib.locktest.XXXX

The Makefile in security/courier-authlib references $LOCKTEST, which makes
the above lockfile. I have two questions:

1. Why is portsdb doing this?

2. How can I make portsdb be as verbose as possible, and show me
   what it's doing when it reaches the point where it creates the
   lockfiles?

Thanks,

Jubal