paalied patch from Julio M. Merino Vidal fixing bug #134751 to fix

* configure.in doc/Makefile.am include/libxml/Makefile.am:
  paalied patch from Julio M. Merino Vidal fixing bug #134751
  to fix --with-html-dir option.
* doc/*: rebuilt fully the docs
* doc/html/libxml-xmlsave.html: new file from new header.
Daniel
diff --git a/doc/APIchunk20.html b/doc/APIchunk20.html
index 58fad06..10ad6e0 100644
--- a/doc/APIchunk20.html
+++ b/doc/APIchunk20.html
@@ -211,6 +211,7 @@
 <a href="html/libxml-parser.html#xmlParseBalancedChunkMemory">xmlParseBalancedChunkMemory</a><br />
 <a href="html/libxml-parser.html#xmlParseBalancedChunkMemoryRecover">xmlParseBalancedChunkMemoryRecover</a><br />
 <a href="html/libxml-parser.html#xmlParseExternalEntity">xmlParseExternalEntity</a><br />
+<a href="html/libxml-xmlsave.html#xmlSaveToFilename">xmlSaveToFilename</a><br />
 <a href="html/libxml-xpathInternals.html#xmlXPathStringFunction">xmlXPathStringFunction</a><br />
 </dd><dt>posteriori</dt><dd><a href="html/libxml-tree.html#xmlSetNs">xmlSetNs</a><br />
 </dd><dt>potential</dt><dd><a href="html/libxml-valid.html#xmlValidGetPotentialChildren">xmlValidGetPotentialChildren</a><br />