Comment 2 for bug 1660142

Here's another sample file with various absolute and relative "file:" URIs.

Inkscape currently crashes for all of them with the exception of the first two which are the only ones valid according to spec.

While fixing the crash it's worth checking if we can even support them properly, since it's common for software to support them regardless of being non-standard (i.e. Firefox handles all of them fine with the exception of the invalid absolute "file:" URI).