preparing 2.4.6 release updated and rebuilt the docs fixed a number of

* configure.in: preparing 2.4.6 release
* doc/xml.html doc/html/*: updated and rebuilt the docs
* include/libxml/*.h *.c: fixed a number of teh/the widht/width typos
Daniel
diff --git a/xpointer.c b/xpointer.c
index 2bc29cb..7764578 100644
--- a/xpointer.c
+++ b/xpointer.c
@@ -1600,7 +1600,7 @@
  * xmlXPtrNbLocChildren:
  * @node:  an xmlNodePtr
  *
- * Count the number of location children of @node or the lenght of the
+ * Count the number of location children of @node or the length of the
  * string value in case of text/PI/Comments nodes
  *
  * Returns the number of location children