Bug by design in getfsfile(3) / needed sanity check for mountpoints

[Garrett Cooper]

Hi hackers,
      I have a question, pending a bug found in getfsfile(3) [1].
      Is there any possibility where a mountpoint be any value other
than a directory, a symlink, or "none", i.e. a flat file?
Thanks,
-Garrett

References:
http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/124409 (not fully in PR
database yet).