Merge branch '2722-error-in-mysql-virtual_forwardings-cf' into 'stable-3.1'

Resolve "error in mysql-virtual_forwardings.cf"

See merge request ispconfig/ispconfig3!1043

install/tpl/mysql-virtual_forwardings.cf.master

 user = {mysql_server_ispconfig_user}
 password = {mysql_server_ispconfig_password}
 dbname = {mysql_server_database}
-table = mail_forwarding
-select_field = destination
-where_field = source
-# additional_conditions = and type != 'aliasdomain' and active = 'y' and server_id = {server_id}
-additional_conditions = and active = 'y' and server_id = {server_id}
-hosts = {mysql_server_ip}
\ No newline at end of file
+hosts = {mysql_server_ip}
+query = SELECT u.email as target FROM mail_forwarding as s INNER JOIN mail_user as u ON (u.email = CONCAT('%u@', SUBSTRING_INDEX(s.destination,'@',-1))) WHERE s.source = '@%d' AND s.type = 'aliasdomain' AND s.active = 'y' AND u.disabledeliver = 'n' AND s.server_id = {server_id} UNION SELECT s.destination as target FROM mail_forwarding as s WHERE s.source = '%s' AND s.type IN ('alias', 'forward') and s.active = 'y' AND s.server_id = {server_id} UNION SELECT s.destination as target FROM mail_forwarding as s INNER JOIN mail_forwarding as f ON (f.source = CONCAT('%u@', SUBSTRING_INDEX(s.destination,'@',-1))) WHERE s.source = '@%d' AND s.type = 'aliasdomain' AND s.active = 'y' AND f.active = 'y' AND s.server_id = {server_id} UNION SELECT s.destination as target FROM mail_forwarding as s WHERE s.source = '@%d' AND s.type IN ('catchall') and s.active = 'y' AND s.server_id = {server_id} UNION SELECT s.destination as target FROM mail_forwarding as s INNER JOIN mail_forwarding as t ON (t.source = s.destination AND t.type = 'catchall') WHERE s.source = '@%d' AND s.type = 'aliasdomain' and s.active = 'y' AND t.active = 'y' AND s.server_id = {server_id}