Fix relative path creation when making a file link
* lisp/org.el (org-insert-link): Correctly determine if we should use
a relative path.
Aidan Gauland writes:
> If I create a link with C-c C-l and give it a relative "file:" link, a
> link is created with an absolute path. For example, C-c C-l
> file:../foo.org <RET> foo puts
> [[file:~/path/to/working-directory/foo.org][foo]] in the buffer. I was
> expecting [[file:../foo.org][foo]].
Carsten Dominik