/var/lib/phpmyadmin/blowfish_secret.inc.php not updated during package upgrade

My main intention here is to thank you all for the great work!

I was able to backport, build and install the packages under Buster.

The only small issue I found was, that the file /var/lib/phpmyadmin/blowfish_secret.inc.php was not updated during package upgrade. There is stored the $cfg['blowfish_secret'] configuration variable from the Stretch package of phpmyadmin.

According to the upstream doc this value must be 32 cahracters long now but the value in my 'old' config file was shorter. So I saw an error, that 'blowfish_secret' is to short followed by a message that connection to the database is lost. This maybe should be fixed in the final package.