implement XML-1.0 5th edition, add parser option XML_PARSE_OLD10 to stick

* include/libxml/parser.h include/libxml/xmlerror.h parser.c:
  implement XML-1.0 5th edition, add parser option XML_PARSE_OLD10
  to stick to old behaviour
* testapi.c gentest.py: modified slightly and regenerated
* Makefile.am: add testchar
Daniel

svn path=/trunk/; revision=3755
8 files changed