Update to switch FAQ from texinfo to DocBook.

winsup/doc/cygwin.dsl

@@ -4,8 +4,11 @@
                 version='1.0'>
 
 <!-- See /usr/share/docbook-xsl/params/ -->
+<xsl:param name="chunker.output.doctype-public" 
+  select="'-//W3C//DTD HTML 4.01 Transitional//EN'" />
 <xsl:param name="html.stylesheet" select="'docbook.css'"/>
 <xsl:param name="use.id.as.filename" select="1" />
+<xsl:param name="root.filename" select="@id" />
 
 <!-- TODO: make URLs and paths wrap with PDF output -->