Just like functions you can now set a policy for moveonfreenospc. This
allows for more flexibility.
For backwards compatibility moveonfreenospc=true is converted to
moveonfreenospc=mfs.
minfreespace does apply which is slightly different from original behavior.
When enabled if a regular file is opened which has a link count > 1 it will
copy the file to a temporary file and rename over the original. Effectively
breaking the link. This behavior is similar to cow-shell and other LD_PRELOAD
based "CoW" solutions.
Antonio SJ Musumeci