Livedown doesn't recognize links to file urls

[chetstone]

A link to a document [here](file:///Users/hortense/somefile.html) is rendering by livedown as:

[here](file:///Users/hortense/somefile.html)

On the other hand a link like this [this here link](html://example.com) is rendered correctly as a link: this here link

The same problem occurs with reference-style links