To prevent situations like in
https://board.s9y.org/viewtopic.php?f=10&t=21591
where the following files were modified by FTP text transfer type but
not handled as such in serendipity_FTPChecksum()
bundled-libs/katzgrau/klogger/phpunit.xml
bundled-libs/simplepie/simplepie.inc
templates/2k11/admin/font/fontello.svg
templates/next/font/fontello.svg
All these *are* text files.
Maybe simplepie.inc should rather be renamed to simplepie.inc.php as well.