* xinclude.c parserInternals.c encoding.c: fixed #99082
  for xi:include encoding="..." support on text includes.
* result/XInclude/tstencoding.xml test/XInclude/docs/tstencoding.xml
  test/XInclude/ents/isolatin.txt : added a specific regression test
* python/generator.py python/libxml2class.txt: fixed the generator
  the new set of comments generated for doc/libxml2-api.xml were
  breaking the python generation.
Daniel