Logging bug (was: Port update outdated problem.)

[Joshua Root]

> I don't truly understand how base works and fits together, and my feeling is few people do, or someone would have figured out the solution to weird bugs like https://trac.macports.org/ticket/37093 by now.

I assure you the logging code is not that hard to understand compared
with some other parts of base. That bug not being fixed is down to it
not happening very often in the wild (I've personally never seen it) and
nobody having provided a reduced test case.

- Josh