Root of the issue was that a1d7ec7139 (from !110109, new comptibility
handling) missed to update code of `handle_subversion_warning`, file
version numbers should be checked here now, not the minversion ones.
On top of that, this report has been changed to a `RPT_WARNING` instead
of a `RPT_ERROR`, and reports 'print level' for file reading was set to
`WARNING` level way too late to have any effect in existing code...
9c2164ba7c