prepare for release work for #303289, fix a formatting bug for MIN_INT

* configure.in doc/* configure.in: prepare for release
* xpath.c: work for #303289, fix a formatting bug for MIN_INT
Daniel
diff --git a/doc/APIchunk26.html b/doc/APIchunk26.html
index cff6ce4..3aefd61 100644
--- a/doc/APIchunk26.html
+++ b/doc/APIchunk26.html
@@ -247,7 +247,8 @@
 </dd><dt>varags</dt><dd><a href="html/libxml-xmlerror.html#xmlGenericErrorFunc">xmlGenericErrorFunc</a><br />
 </dd><dt>vararg</dt><dd><a href="html/libxml-valid.html#xmlValidityErrorFunc">xmlValidityErrorFunc</a><br />
 <a href="html/libxml-valid.html#xmlValidityWarningFunc">xmlValidityWarningFunc</a><br />
-</dd><dt>variables</dt><dd><a href="html/libxml-xpath.html#_xmlXPathContext">_xmlXPathContext</a><br />
+</dd><dt>variables</dt><dd><a href="html/libxml-xpath.html#XML_XPATH_NOVAR">XML_XPATH_NOVAR</a><br />
+<a href="html/libxml-xpath.html#_xmlXPathContext">_xmlXPathContext</a><br />
 <a href="html/libxml-nanoftp.html#xmlNanoFTPProxy">xmlNanoFTPProxy</a><br />
 <a href="html/libxml-xpathInternals.html#xmlXPathRegisteredNsCleanup">xmlXPathRegisteredNsCleanup</a><br />
 <a href="html/libxml-xpathInternals.html#xmlXPathRegisteredVariablesCleanup">xmlXPathRegisteredVariablesCleanup</a><br />