chmod, chown, removexattr, setxattr, truncate, utimens:
* if no errors: return 0
* if no successes: return first error
* if file acted on was the same as related search function: return its value
* return 0
rmdir, unlink:
* if no errors: return 0
* return first error
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.