Signed-off-by: Jaime Pérez Crespo <jaime.perez@uninett.no>

This reverts commit 00716eb4.

This allows us to still validate XML documents (disabling the entity loader makes it impossible, as we have multiple schemas in different files), while protecting against schemas trying to import from URLs.

This reverts commit 961f5250.

This is done already when creating the document, but here we should protect as well against rogue schema files.

Apparently, links to modules must have a "./" prefix.

We don't control we type of the default value

Signed-off-by: Jaime Pérez Crespo <jaime.perez@uninett.no>

Signed-off-by: Jaime Pérez Crespo <jaime.perez@uninett.no>