-which they're executed, what charset the scripts are written in
-etc. The control fields are tag/value pairs contained in comments.
-
-=head1 OLD UPGRADE FILES
-
-The files in C<sql/Pg-upgrade> are so old that I don't bother
-documenting them. They're handled by this class, too, but new files
-are only created as C<Pg-upgrade2> files.