GHSA-34qg-65m4-f23m: Froxlor: /etc/pure-ftpd/db/mysql.conf is chmod 644 but contains <SQL_UNPRIVILEGED_PASSWORD>

In Froxlor 2.1.9 and in the HEADs of the main, v2.2 and v2.1 branches , the XML templates in lib/configfiles/ set chmod 644 for /etc/pure-ftpd/db/mysql.conf, although that file contains <SQL_UNPRIVILEGED_PASSWORD>. At least on Debian 12, all parent directories of /etc/pure-ftpd/db/mysql.conf are world readable by default, thus exposing these credentials to all users with access to the system. Only Froxlor instances configured to use pure-ftpd are affected/vulnerable.