MFC r240410:

MFC r240410:

  Avoid mapping ENOENT to ENOTDIR for non-existent path components.

  The ENOTDIR mapping was introduced in r235266 for kern/128933 based on
  an interpretation of the somewhat ambiguous language in the POSIX realpath
  specification.  The interpretation is inconsistent with Solaris and Linux,
  a regression from 9.0, and does not appear to be permitted by the
  description of ENOTDIR:

       20 ENOTDIR Not a directory.  A component of the specified pathname
               existed, but it was not a directory, when a directory was
               expected.

PR: standards/171577

git-svn-id: svn://svn.freebsd.org/base/stable/9@240528 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f