Support for non-DAV collections

Speaking of RFC2518bis, do we have any support for this option in any  
WebDAV implementations?  I don't recall it being tested in past interops...

"   A resource MAY be a collection but not be WebDAV compliant.  That is,
    the resource may comply with all the rules set out in this
    specification regarding how a collection is to behave without
    necessarily supporting all methods that a WebDAV compliant resource
    is required to support.  In such a case the resource may return the
    DAV:resourcetype property with the value DAV:collection but MUST NOT
    return a DAV header containing the value "1" on an OPTIONS response."

If this option isn't implemented or isn't interoperable, let's cut it.

Lisa