Fix 2 File.toURL() deprecation warnings

This method does not automatically escape characters that
are illegal in URLs.  It is recommended that new code convert an
abstract pathname into a URL by first converting it into a URI, via the
toURI() method, and then converting the URI into a URL
via the URI.toURL method.

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>