Log Message:
update to 2.6.12
changes:
-improvements: DocBook catalog build scrip (William), xmlcatalog tool
 (Albert Chin), xmllint --c14n option, no_proxy environment (Mike Hommey),
 xmlParseInNodeContext() addition, extend xmllint --shell, allow XInclude
 to not generate start/end nodes, extend xmllint --version to include
 CVS tag (William)
+bugfixes