Added folder target, simplified user configuration, few renames... Need to work on tests....

target/dovecot/auth-passwdfile.inc

@@ -0,0 +1,21 @@
+# Authentication for passwd-file users. Included from 10-auth.conf.
+#
+# passwd-like file with specified location.
+# <doc/wiki/AuthDatabase.PasswdFile.txt>
+
+passdb {
+  driver = passwd-file
+  args = scheme=CRYPT username_format=%u /etc/dovecot/userdb
+}
+
+userdb {
+  driver = passwd-file
+  args = username_format=%u /etc/dovecot/userdb
+
+  # Default fields that can be overridden by passwd-file
+  #default_fields = quota_rule=*:storage=1G
+  default_fields = uid=docker gid=docker home=/var/mail/%d/%u
+
+  # Override fields from passwd-file
+  #override_fields = home=/home/virtual/%u
+}