* doc/xmllint.1 doc/xmllint.html doc/xmllint.xml: fixed a typo
  pointed by Jeroen Ruigrok
* include/libxml/xmlreader.h include/libxml/xmlschemas.h: increased
  the APIs for xmlReader schemas validation support
* xmllint.c xmlreader.c xmlschemas.c: xmlReader schemas validation
  implementation and testing as xmllint --stream --schema ...
Daniel