added support for large file, tested with a 3+GB instance, and some

* libxml.h include/libxml/parser.h parser.c xmlIO.c DOCBparser.c:
  added support for large file, tested with a 3+GB instance,
  and some cleanup.
* catalog.c: added a TODO
* Makefile.am: added some "make tests" comments
Daniel
diff --git a/Makefile.am b/Makefile.am
index 216af1b..9d32c31 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -408,6 +408,8 @@
 	@echo "##"
 	@echo "## XInclude regression tests"
 	@echo "##"
+	@echo "## the warning reported on fallback.xml test is expected"
+	@echo "##"
 	-@(for i in $(srcdir)/test/XInclude/docs/* ; do \
 	  name=`basename $$i`; \
 	  if [ ! -d $$i ] ; then \
@@ -736,6 +738,9 @@
 	@echo "##"
 	@echo "## Relax-NG streaming regression tests"
 	@echo "##"
+	@echo "## Some error messages are different than non-streaming"
+	@echo "## and generate small diffs"
+	@echo "##"
 	-@(for i in $(srcdir)/test/relaxng/*.rng ; do \
 	  name=`basename $$i | sed 's+\.rng++'`; \
 	  for j in $(srcdir)/test/relaxng/"$$name"_*.xml ; do \