Log Message:
Updating www/p5-HTML-Tree from 3.23nb2 to 4.0

pkgsrc changes:
- adjust dependencies
- adding license definition

Upstream changes:
4.0    Mon Sep 20 2010
    [THINGS THAT MAY BREAK YOUR CODE OR TESTS]
    * Changes to entity encoding from ord values to XML entities may break
      tests expecting � style encoding.
    * Attribute names are now validated in as_XML and invalid names will
      cause an error.

    [FIXES]
    * Optionally empty tags with content now have close tag. (RT #49932 #41806)
    * Added attribute name validation. (RT #23439)
    * Added span to @TAGS in AsSubs. (RT #55848)
    * Changed tag encoding to human readable form, e.g. >, and stopped
      re-encoding encoded tags (RT #55835)
    * Added no_expand_entities option to disable entity decoding when
      parsing source. (RT #24947)
    * Fix replace_with not setting parent for an array of content.
      (RT #28204 #45495)
    * Removed newline being appended to as_HTML output. (RT #41739)
    * Fix invalid parent for subsclasses. (RT #36247)
    * Fixed #! line in tests (RT #41945)
    * Switched to Module::Build
    * Fixed Perl::Critic errors
    * Added lots of use strict and use warnings
    * Fix PERL_UNICODE breaking tests. (RT #28404)
    * Add check for class type to traverse. (RT #35948)
    * Move attribute name validation to as_XML. (RT #60619)
    * Fix critic test exploding if Test::Perl::Critic isn't installed.
    * Fix annoying message about x.yy_z not being numeric in t/building.t
    * Added extra_chars options to as_trimmed_text (RT #26436)
    * Added catch for broken table tags (RT #59980)
    * Replace parentheses for constants. (RT #58880)
    * Removed build deps Devel::Cover, Test::Pod::Coverage, Test::Perl::Critic.
      (RT #58878)
    * Added create_makefile_pl => 'traditional' to Build.PL (RT #58878)

    [ENHANCEMENTS]
    * (Ricardo Signes RT #26282) The secret hack to allow elements to be created
      from classes other than HTML::Element has been cleaned up and documented
      for the benefit of TreeBuilder subclasses.
      q.v., HTML::TreeBuilder->element_class
    * Added HTML::Element::encoded_content to control encoding of entities on
      output.

   [TESTS]
    * Added test for optionally empty tags, like A.
    * Added test for invalid attribute name.
    * Added more tests for entity parsing.
    * Add parent test from Christopher J. Madsen. (RT #28204)
    * Add subclass test. (RT #36247)

    [DOCUMENTATION]
    * Docs spelling patch from Ansgar Burchardt <ansgar@43-1.org> (RT #55836)
    * Added definition of white space to as_trimmed_text. (RT #26436)