Fix broken WebDAV digest auth

[yiip87]

Authenticating via digest auth was not possible if the following conditions were met:

• Enable WebDAV --> On
• Enable for all users --> Off
• My Account - Activate WebDAV shares --> On

In this case getDigestHash() always returns false. Because of this, authentication always fails.

This issue can be reproduced on a fresh installation of Pydio 7.0.4 and 8.0.0.

[cdujeu]

Hi @yiip87 thanks for contributing! We'll have a look at that shortly Best charles