Add some XML differences. Remove ref to setuptools which is not in 2.5

pep-0356.txt

@@ -136,7 +136,6 @@ Deferred until 2.6:
       http://mail.python.org/pipermail/python-dev/2006-February/060926.html
 
     - bdist_egg in distutils package
-      (though bdist_egg is supported in setuptools)
 
     - pure python pgen module
       (Owner: Guido)
@@ -149,6 +148,8 @@ Open issues
     - Bugs that need resolving before release:
         http://python.org/sf/1517042 - Fix crashers/gc_inspection.py
         http://python.org/sf/1515471 - stringobject (char buffers)
+        http://python.org/sf/1513611 - XML: xml.sax.expatreader missing
+        http://python.org/sf/1511497 - XML: xml.sax.ParseException issue
         http://python.org/sf/1508010 - msvccompiler using VC6
         http://python.org/sf/1494314 - can't use high sockets (regr in 2.4.3)
         http://python.org/sf/1475523 - gettext.py bug