Release of libxml2-2.9.0

* libxml.spec.in: update
* doc/*: updated and regenerated
* libxml2.syms testapi.c: regenerated
diff --git a/doc/APIchunk6.html b/doc/APIchunk6.html
index 2b1659c..346e7e5 100644
--- a/doc/APIchunk6.html
+++ b/doc/APIchunk6.html
@@ -202,6 +202,7 @@
 <a href="html/libxml-relaxng.html#xmlRelaxNGNewParserCtxt">xmlRelaxNGNewParserCtxt</a><br />
 <a href="html/libxml-relaxng.html#xmlRelaxNGNewValidCtxt">xmlRelaxNGNewValidCtxt</a><br />
 </dd><dt>Remove</dt><dd><a href="html/libxml-catalog.html#xmlACatalogRemove">xmlACatalogRemove</a><br />
+<a href="html/libxml-tree.html#xmlBufShrink">xmlBufShrink</a><br />
 <a href="html/libxml-tree.html#xmlBufferDetach">xmlBufferDetach</a><br />
 <a href="html/libxml-tree.html#xmlBufferShrink">xmlBufferShrink</a><br />
 <a href="html/libxml-catalog.html#xmlCatalogRemove">xmlCatalogRemove</a><br />