SafeUri: rename parameter to be less confusing
SafeUri: rename parameter to be less confusing

The ctor overload that accepts both file names and URIs via string
has a second bool parameter 'isUri' to distinguish them, therefore
it is confusing to call the first parameter just "uri".

This commits renames it to "uriOrFilename".

arfbtwn/hyena,GNOME/hyena,GNOME/hyena,arfbtwn/hyena