Maintainers for proftpd-mod-mysql are ProFTPD Maintainance Team <pkg-proftpd-maintainers@alioth-lists.debian.net>.
You may want to refer to the following packages that are part of the same source: proftpd-basic, proftpd-core, proftpd-dev, proftpd-doc, proftpd-mod-crypto, proftpd-mod-geoip, proftpd-mod-ldap, proftpd-mod-odbc, proftpd-mod-pgsql, proftpd-mod-snmp, proftpd-mod-sqlite, proftpd-mod-wrap.
You might like to refer to the proftpd-mod-mysql package page, to the Package Tracking System, or to the source package src:proftpd-dfsg's bug page.
If you find a bug not listed here, please report it.