File list of package lighttpd-mod-vhostdb-pgsql in bullseye-backports of architecture armhf
/usr/lib/lighttpd/mod_vhostdb_pgsql.so /usr/share/doc/lighttpd-mod-vhostdb-pgsql
/usr/lib/lighttpd/mod_vhostdb_pgsql.so /usr/share/doc/lighttpd-mod-vhostdb-pgsql