Log Message:
Update pkgtools/libnbcompat to 20040805.  Changes from version 20040512
include:

  (1) Add a statvfs() implementation based on statfs(), and remove the
      statfs() NetBSD-compatibility implementation.  statvfs() is used
      in src/usr.sbin/pkg_install on the HEAD branch.

  (2) Add a fnmatch() implementation, needed by IRIX.  fnmatch() is used
      in src/usr.sbin/pkg_install on the HEAD branch.

  (3) Remove fseeko(), inet_ntop(), inet_pton(), sl_*() strptime(), and
      timegm() as they're not used by any of the bootstrap packages that
      require libnbcompat (pax, mtree, pkg_install).  All that's left is
      what's necessary to bootstrap those three packages.