automated the generation of the man page based on xsltproc and a

* doc/Makefile.am doc/xmlcatalog.1 doc/xmlcatalog_man.xml
  doc/xmllint.1 doc/xmllint.xml: automated the generation of the
  man page based on xsltproc and a stylesheet PI in the XML.
Daniel
diff --git a/doc/xmllint.xml b/doc/xmllint.xml
index dd5966e..3ab1467 100644
--- a/doc/xmllint.xml
+++ b/doc/xmllint.xml
@@ -1,4 +1,6 @@
 <?xml version="1.0"?>
+<?xml-stylesheet type="text/xsl"
+   href="http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl"?>
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
     "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
 ]>