traversal code ("fts") in NetBSD's libc will interpret this as a
cycle and error out, so "ls -R" and "find" will not work.
- - There is no support for ACLs. If/when some enterprising person
- fixes this, adjust t/compare-trees.
+ - It is not clear if extended attribute and POSIX acl support does
+ anything useful.
Notes on Cygwin