r3240: - update the rules for what error codes should be given on the

r3240: - update the rules for what error codes should be given on the
  different type of unlink an seach mismatches

- wildcard directory listings that have attribute
  FILE_ATTRIBUTE_DIRECTORY and match "." or ".." should be failed.

- don't set the write_time on SMBclose unless it is non-zero

- added much better support for setfileinfo and setpathinfo in pvfs

- better (and more efficient) handling of .. and . components in filenames
(This used to be commit 9305b07af395a158cb9f0c1c9486f7122c79d357)