updating a very old Macports install

[Joshua Root]

> See below:
> expected integer but got "-exclusive" obtaining lock on
> /opt/local/var/macports/registry/.registry.lock
>     while executing
> "registry::exclusive_lock"
>     (procedure "mportexec" line 32)

You appear to be running trunk. You could take this opportunity to go
back to a released version of base; or you could just accept this aspect
of living on trunk. :)

- Josh