Added target for mysql.xml to Docs/Makefile.am.

Docs/Makefile.am:
  Added target for mysql.xml.

Docs/Makefile.am

@@ -7,7 +7,7 @@
 # and BSD makes
 
 # If you know how to fix any of this more elegantly please mail
-# david@mysql.com
+# docs@mysql.com
 
 TEXI2HTML_FLAGS =	-iso -number
 DVIPS =			dvips
@@ -93,6 +93,10 @@ nusphere.pdf: manual.texi
 	rm -f manual-tmp.*
 	touch $@
 
+# Target to produce DocBook XML
+mysql.xml: manual.texi include.texi
+	$(MAKEINFO) --force --no-ifinfo --docbook manual.texi
+
 # The texi2dvi gives a lot of harmless errors. Just ignore them unless
 # you want to help with the typesetting part.
 # This is the European papersize version