Possible bug in qcopy-acl.c

[Ondrej Valousek]

Hi all,

I think we might have a bug in qcopy-acl.c as currently, when we copy files 
from say NFSv4 to ext4 filesystems, then "cp -p" produces warning that it could 
not preserve permissions.
That makes a sense, but perhaps we should issue "attr_copy_file()" only if the 
file has a non-trivial acls on it (can be checked with our function 
file-has-acl()).

The benefit of that would be that copying files from NFS to non-nfs filesystems 
would only produce this warning if there is a non-trivial acl present.
The disadvantage of it would be the additional call for file-has-acl() so hence 
few more kernel calls.

What do you think?
Ondrej