MFC r196511:

MFC r196511:
  - Update config to doxygen 1.5.2 (I use this with 1.5.9).
  - Add linprocfs and linsysfs to the linuxulator dox.
  - Take the generated includes from the .m files from a subdirectory
    instead of putting everything into $(.OBJDIR). This imporves the
    human readbility of the source directory contents a lot, if you do not
    create a separate OBJDIR.
  - Assume UTF-8 encoding for every input file.
  - Strip the source and dest path from the output, we are not interested
    in the absolute location on the machine where the docs are created,
    relative the the root of the FreeBSD source is what interests us.
  - Exclude .svn directories.
  - Switch to alphabetic index.
  - Use one line per INCLUDE_PATH member in the common dox-config.
  - Bump the __FreeBSD__ version to 9. [here in the MFC: to 8]
  - Switch from hardcoded .m files to an run-time generated one. Takes
    a little bit more time to get started with actual work, but at least
    is more future-proof. If you generate dox for all subsystems, the
    time to find all .m files in the source is magnitutes lower than
    producing the docs.
  - Make the *DEST_PATH overidable from the environment. This allows to
    produce the output directly in the docroot of a webserver.
  - Fix the path when telling the user where he can find the API docs.

git-svn-id: svn://svn.freebsd.org/base/stable/8@198946 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f