elaborated on description of xmlValidityWarningFunc and

* include/libxml/valid.h: elaborated on description of
  xmlValidityWarningFunc and xmlValidityErrorFunc (bug
  144760)
* xmlIO.c, xmlschemastypes.c, include/libxml/schemasinternals.h:
  minor fixes to comments for doc rebuilding errors.
* doc/*.html: rebuilt the docs
diff --git a/doc/APIchunk1.html b/doc/APIchunk1.html
index 6addbe3..af4d8b0 100644
--- a/doc/APIchunk1.html
+++ b/doc/APIchunk1.html
@@ -205,6 +205,7 @@
 <a href="html/libxml-xpathInternals.html#xmlXPathRegisteredVariablesCleanup">xmlXPathRegisteredVariablesCleanup</a><br />
 </dd><dt>Clear</dt><dd><a href="html/libxml-parser.html#xmlClearNodeInfoSeq">xmlClearNodeInfoSeq</a><br />
 <a href="html/libxml-parser.html#xmlClearParserCtxt">xmlClearParserCtxt</a><br />
+<a href="html/libxml-xmlIO.html#xmlPopInputCallbacks">xmlPopInputCallbacks</a><br />
 </dd><dt>Clears</dt><dd><a href="html/libxml-parser.html#xmlSetupParserForBuffer">xmlSetupParserForBuffer</a><br />
 </dd><dt>Close</dt><dd><a href="html/libxml-xmlIO.html#xmlFileClose">xmlFileClose</a><br />
 <a href="html/libxml-xmlIO.html#xmlIOFTPClose">xmlIOFTPClose</a><br />