Improve the upgrade process a bit. It was previously possible for
the log file to be owned by root because most files were opened/created
before the uid was switched to non-root. That's not the case anymore
so we need to be sure those files are owned by slimserv:slimserv.
This isn't a problem with new installed because they are made
correctly in the rc script, but on upgrades it may be an issue.
Handle this by resetting the permissions of existing files and
directories during the install.
While I'm here, remove some leftover directory creation. It properly
belongs in the startup script so the files will be created if /var
Bump port revision.