[Bug 50867] wine start /unix stopped working in 6.5

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50867

--- Comment #1 from Alexandre Julliard  ---
What has changed is that Wine is more strict about requiring the file to
execute to actually be found on disk. By default, start.exe is installed into
c:\windows\command, which is not in the standard path, so it isn't found.

We should probably add a workaround for this case. For the time being, copying
start.exe into c:\windows\system32 should work.