[Imps] liberal XML and implied end tags

[Sam Ruby]

Inside src/liberalxmlparser.py, I see:

>              if node.name == name:
>                  #XXX Something is wrong here... The next (commented) line is
>                  #html-only
>                  #self.tree.generateImpliedEndTags()

Problem #1: if I uncomment out that line, no tests fail.  What's up with 
that?  If I need to make a fix that involves restoring that line, how 
will I know what that breaks?

Problem #2: the functionality that was supposed to be enabled by that 
logic can be expressed by the following addition to BasicXmlTest:

>     def test_mismatch(self):
>       self.assertXmlEquals("<x><y>foo</x>bar","<x><y>foo</y></x>bar")

Unfortunately, that test doesn't pass, with or without the line in 
question; my first inclination is to restore the commented out line and 
then debug why it doesn't work, but I'm reluctant to do so without an 
understanding of what problem was solved by commenting out the line in 
the first place.

- Sam Ruby