Bug#397239: [Fwd: Re: apache2: Since ugrading to 2.2.3-3, webdav doesn't work: Invalid command 'AuthDigestFile']
ThX for your hint !
In Apache2.2, the directives for mod_auth_digest have changed:
You have to define a Provider |AuthDigestProvider (i.e "file")
and then you have to use the AuthUserFile directive to
tell the (file-)provider where the "file" is.
I also needed to add the links of the mod's:
...to the mods-enabled directory to complete the upgrade to 2.2.
All the people that are using the auth_digest module will
have problems with their upgrade.
(see also: http://httpd.apache.org/docs/2.2/mod/mod_auth_digest.html)