OASIS RelaxNG testsuite python script to run regression against OASIS

* test/relaxng/OASIS/spectest.xml: OASIS RelaxNG testsuite
* check-relaxng-test-suite.py: python script to run regression
  against OASIS RelaxNG testsuite
* relaxng.c: some cleanup tweaks
* HTMLparser.c globals.c: cleanups in comments
* doc/libxml2-api.xml: updated the API
* result/relaxng/*: errors moved files, so large diffs but
  no changes at the semantic level.
Daniel
diff --git a/HTMLparser.c b/HTMLparser.c
index 138bf73..7f7bfdf 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -5529,8 +5529,8 @@
 }
 /**
  * htmlNodeStatus:
- * @node - an htmlNodePtr in a tree
- * @legacy - whether to allow deprecated elements (YES is faster here
+ * @node: an htmlNodePtr in a tree
+ * @legacy: whether to allow deprecated elements (YES is faster here
  *	for Element nodes)
  *
  * Checks whether the tree node is valid.  Experimental (the author