Minor fixes in the pfxadmin migration script.

see #577

modoboa/core/commands/templates/settings.py.tpl

@@ -162,6 +162,9 @@ MODOBOA_APPS = (
     'modoboa.extensions.stats',
     'modoboa.extensions.sievefilters',
     {% if not amavis_conn %}#{% endif %}'modoboa.extensions.amavis',
+
+    # Tools from here
+    #'modoboa.tools.pfxadmin_migrate',
 )
 
 INSTALLED_APPS += MODOBOA_APPS

modoboa/tools/pfxadmin_migrate/management/commands/migrate_from_postfixadmin.py

@@ -56,7 +56,7 @@ import modoboa.core.models as core_models
 import modoboa.extensions.admin.models as admin_models
 from modoboa.lib.emailutils import split_mailbox
 
-from . import models as pf_models
+from modoboa.tools.pfxadmin_migrate import models as pf_models
 
 
 class Command(BaseCommand):