[Zope] howto keep doc-types via WebDAV?

[Florian Konnertz]

Hi zopies!
I use davfs to edit my documents on the zope-server. I edit them on my 
local filesystem, then copy them to the remote server.
All docs are after this ceremony from the type: 
 text/x-unknown-content-type.

How can I achieve to keep the type, e.g. dtml-docs ?
I tried different suffixes (bla.dtml etc.) - No effect.
I couldn't find anything in the davfs docu.

Thank you in advance,
Florian