# dict-type	so-name (pathname)	dict-function	mkmap-function
cdb	postfix-cdb.so	dict_cdb_open	mkmap_cdb_open
ldap	postfix-ldap.so	dict_ldap_open
lmdb	postfix-lmdb.so	dict_lmdb_open	mkmap_lmdb_open
mysql	postfix-mysql.so	dict_mysql_open
pcre	postfix-pcre.so	dict_pcre_open
pgsql	postfix-pgsql.so	dict_pgsql_open
sqlite	postfix-sqlite.so	dict_sqlite_open