initial implementation of reverse proxy, using django-revproxy from within a middleware

add new config entry "primary_domain" which is used to set the cookie domain

passbook/app_gw/forms.py

@@ -0,0 +1,30 @@
+"""passbook Application Security Gateway Forms"""
+
+from django import forms
+from django.contrib.admin.widgets import FilteredSelectMultiple
+from django.utils.translation import gettext as _
+
+from passbook.app_gw.models import ApplicationGatewayProvider
+from passbook.lib.fields import DynamicArrayField
+
+
+class ApplicationGatewayProviderForm(forms.ModelForm):
+    """Security Gateway Provider form"""
+
+    class Meta:
+
+        model = ApplicationGatewayProvider
+        fields = ['server_name', 'upstream', 'enabled', 'authentication_header',
+                  'default_content_type', 'upstream_ssl_verification']
+        widgets = {
+            'authentication_header': forms.TextInput(),
+            'default_content_type': forms.TextInput(),
+            'property_mappings': FilteredSelectMultiple(_('Property Mappings'), False)
+        }
+        field_classes = {
+            'server_name': DynamicArrayField,
+            'upstream': DynamicArrayField
+        }
+        labels = {
+            'upstream_ssl_verification': _('Verify upstream SSL Certificates?')
+        }