Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxslt/libxslt/xslt.h

Index: third_party/libxslt/libxslt/xslt.h
diff --git a/third_party/libxslt/libxslt/xslt.h b/third_party/libxslt/libxslt/xslt.h
index 849b03c4cbd7af394a2d126ae4e2c04dc50d515c..02f491a58ec0e87e5e9d630be1ab81ad3e354f87 100644
--- a/third_party/libxslt/libxslt/xslt.h
+++ b/third_party/libxslt/libxslt/xslt.h
@@ -43,7 +43,7 @@ extern "C" {
  *
  * The XSLT specification namespace.
  */
-#define XSLT_NAMESPACE ((xmlChar *) "http://www.w3.org/1999/XSL/Transform")
+#define XSLT_NAMESPACE ((const xmlChar *)"http://www.w3.org/1999/XSL/Transform")
 
 /**
  * XSLT_PARSE_OPTIONS:
@@ -62,6 +62,13 @@ extern "C" {
 XSLTPUBVAR int xsltMaxDepth;
 
 /**
+ *  * xsltMaxVars:
+ *   *
+ *    * This value is used to detect templates loops.
+ *     */
+XSLTPUBVAR int xsltMaxVars;
+
+/**
  * xsltEngineVersion:
  *
  * The version string for libxslt.
@@ -92,7 +99,7 @@ XSLTPUBFUN void XSLTCALL
 /*
  * Global cleanup function.
  */
-XSLTPUBFUN void XSLTCALL	
+XSLTPUBFUN void XSLTCALL
 		xsltCleanupGlobals	(void);
 
 #ifdef __cplusplus