* xmlschemas.c: A warning will now be reported in the value of
  the XSD attribute 'schemaLocation' does not consist of tuples
  (namespace-name, document-URI). A warning will be reported
  if a schema document could not be found at the specified
  location (via 'schemaLocation' or
  'noNamespaceSchemaLocation').
* include/libxml/xmlerror.h: Added XML_SCHEMAV_MISC to
  xmlParserErrors.