Update to 1.8

Upstream changes:
*** 200?/??/?? Version 1.6

Fixed example output in doc in MD4.pm. Reported by jbwaters@gmail.com.

*** 2013/03/14 Version 1.7
Removed defunct code that caused incorrect error message when building on 64 bit platforms, patch by
zefram

*** 2013/03/14 Version 1.8
Fixed a test error in files.t. Corrected the comment to do with the reason in
verison 1.7
Updated security/p5-Digest-MD4 to 1.8
Update to 0.28

Upstream changes:
0.28 Thu Mar 14 2013
        [FIXES]
        - the Accept-Encoding header removal code was broken in the previous
          version. Now the header will be removed as soon as a body filter
          is configured.
        [TEST]
        - use File::Spec in the test suite to compute portable file names,
          to avoid some test failures, like
          http://www.cpantesters.org/cpan/report/856ca676-6bf5-1014-bfa1-9d8aa3912248

0.27 Fri Mar  8 2013
        [IMPROVEMENTS]
        - in HTTP::Proxy::HeaderFilter::standard, now remove the Accept-Encoding header
          only when we know we'll actually look at the response body
        [TESTS]
        - use httpstat.us to test HTTP statuses

0.26 Wed Feb  6 2013
        [IMPROVEMENTS]
        - remove a "Use of "goto" to jump into a construct is deprecated"
          warning (Tom Hukins)
        [DOCUMENTATION]
        - fix RT #77685 (Tom Hukins)
        - improved the number of links to other modules from the documentation
        [TEST]
        - fix RT #71771 (Tom Hukins)
        - fix test failures in POD tests (Tom Hukins)
Updated www/p5-HTTP-Proxy to 0.28
*** empty log message ***
Note that there's a difference using this rather than the older.
Make oxenstored (more) usable, as originally researched by
Aaron J. Grier, with implementation changes by myself:

- rules to add the run-time path correctly when building shared versions
  of libraries. Using -dllpath to ocamlmklib for this - ',' would need
  to be clumsily escaped from gmake.

  (This also needs a patched ocamlmklib - from ocaml 4.00.1nb2 -
  that has -elfmode which prevents -L paths being added to the
  run-time path).

- Path fixes, but not using fixed paths as originally proposed,
  but the SUBST framework.

- Trim whitespace off a numeric string read out of the kernel.
  Instead of open coding the function, use String.trim, as the
  String library is used, anyway. (available in ocaml >= 4.00.1)
Add a new subcommand "mozilla-rootcerts install" that unpacks and installs
the certificates with a single command.

ok gdt, wiz
don't link against libpthread on NetBSD, to avoid problems with
xdm loading the library dynamically, reported by Takahiro Kambe
xentools41-4.1.4nb2