apply a couple of patches from Christian Cornelssen fixing the man pages

* libxml.3 doc/buildDocBookCatalog: apply a couple of patches
  from Christian Cornelssen fixing the man pages and the Catalog
  building script.
* xmlschemas.c include/libxml/schemasInternals.h: nothing new yet
  next step is <xs:import> I now have a reasonable understanding
  of how it works.
Daniel
5 files changed