Use SHA256-CRYPT as default password schema

roles/ispmail-database/files/schema.sql

@@ -7,7 +7,7 @@ CREATE TABLE IF NOT EXISTS `virtual_domains` (
 CREATE TABLE IF NOT EXISTS `virtual_users` (
   `id` int(11) NOT NULL auto_increment,
   `domain_id` int(11) NOT NULL,
-  `password` varchar(32) NOT NULL,
+  `password` varchar(150) NOT NULL,
   `email` varchar(100) NOT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `email` (`email`),

roles/ispmail-dovecot/templates/dovecot-sql.conf.ext.j2

@@ -142,6 +142,6 @@
 
 driver = mysql
 connect = host=127.0.0.1 dbname=mailserver user=mailuser password={{ispmail_mysql_mailuser_password}}
-default_pass_scheme = PLAIN-MD5
+default_pass_scheme = SHA256-CRYPT
 password_query = SELECT email as user, password FROM virtual_users WHERE email='%u';