The previous approach had circular symbolic links for directories
which is bad as it confuses DOS programs.
It seems clearer to create a drive_z directory with contents equal
to the old freedos directory (even though there may not be a freedos
present).


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@1698 7758b857-130e-0410-ab9c-d8735a528d18