 the <span class='code'>weewx</span>
        databases.</p>
    
    <p>Unmodified files will be upgraded. If modifications have been made to
        the configuration, <span class='code'>rpm</span> will display a message
        about any differences between the changes and the new configuration.
        Any new changes from the upgrade will be noted as files with a
        <span class='code'>.rpmnew</span> extension and the modified files will
        be left untouched.</p>
    
    <p>For example, if <sp