Mark more parser functions as deprecated

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parser.c

@@ -12745,6 +12745,8 @@ xmlIOParseDTD(xmlSAXHandlerPtr sax, xmlParserInputBufferPtr input,
  * @ExternalID:  a NAME* containing the External ID of the DTD
  * @SystemID:  a NAME* containing the URL to the DTD
  *
+ * DEPRECATED: Don't use.
+ *
  * Load and parse an external subset.
  *
  * Returns the resulting xmlDtdPtr or NULL in case of error.
@@ -13797,6 +13799,8 @@ xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
  * @sax:  the SAX handler block
  * @filename:  the filename
  *
+ * DEPRECATED: Don't use.
+ *
  * parse an XML external entity out of context and build a tree.
  * It use the given SAX function block to handle the parsing callback.
  * If sax is NULL, fallback to the default DOM tree building routines.