-Index: twisted/web2/dav/resource.py
+Index: resource.py
 ===================================================================
---- twisted/web2/dav/resource.py	(revision 18545)
-+++ twisted/web2/dav/resource.py	(working copy)
+--- resource.py	(revision 18545)
++++ resource.py	(working copy)
 @@ -130,6 +130,8 @@
          (dav_namespace, "acl-restrictions"          ), # RFC 3744, section 5.6
          (dav_namespace, "inherited-acl-set"         ), # RFC 3744, section 5.7

 
                 def login(pcreds):
                     d = request.portal.login(pcreds, None, *request.loginInterfaces)
@@ -635,13 +700,14 @@
 
                     return d
 

         return succeed(None)
 
 class DAVPrincipalResource (DAVLeafResource):
@@ -1712,6 +2076,37 @@
 davxml.registerElement(TwistedACLInheritable)
 davxml.ACE.allowed_children[(twisted_dav_namespace, "inheritable")] = (0, 1)
 
