Merge branch '5967-sender_login_maps-read-email.cc' into 'develop'

sender_login_maps returns mail_user.cc

Closes #5967

See merge request ispconfig/ispconfig3!1357

Author: Marius Burkard

install/tpl/mysql-virtual_sender_login_maps.cf.master

@@ -9,3 +9,6 @@ query = SELECT destination FROM mail_forwarding WHERE source = '%s' AND active =
         UNION
         SELECT login FROM mail_user WHERE email = '%s' AND disablesmtp = 'n' AND server_id = {server_id}
            AND EXISTS (SELECT domain_id FROM mail_domain WHERE domain = SUBSTRING_INDEX(email, '@', -1) AND active = 'y' AND server_id = {server_id})
+        UNION
+        SELECT cc FROM mail_user WHERE email = '%s' AND disablesmtp = 'n' AND disabledeliver = 'y' AND server_id = {server_id}
+           AND EXISTS (SELECT domain_id FROM mail_domain WHERE domain = SUBSTRING_INDEX(email, '@', -1) AND active = 'y' AND server_id = {server_id})