* test/webrick/test_htmlutils.rb: add test for WEBrick::HTMLUtils.

	* lib/webrick/htmlutils.rb (WEBrick::HTMLUtils#escape): replace HTML
	  meta chars even in non-ascii string.  [Bug #8425] [ruby-core:55052]

	* lib/webrick/httputils.rb (WEBrick::HTTPUtils#{_escape,_unescape}):
	  fix %-escape encodings.  [Bug #8425] [ruby-core:55052]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@45012 b2dd03c8-39d4-4d8f-98ff-823fe69b080e