Treat the XML::Parser case for package management

LFS/lfs.xsl

@@ -142,18 +142,17 @@
     </xsl:if>
   </xsl:template>
 
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   <xsl:template match="sect2">
+    <!--XML::Parser is on the same page as Perl. The present code is OK
+        except for PKG_DEST and PKGDIR, which would be the same as for Perl.
+        so set them to valid values.-->
+    <xsl:if test="contains(string(./title),'XML::Parser')">
+      <xsl:text>PKGDIR=$(dirname $PKGDIR)/</xsl:text>
+      <xsl:copy-of select="substring-after(.//userinput[@remap='pre'], 'cd ')"/>
+      <xsl:text>
+PKG_DEST=$(dirname $PKGDIR)/000-xml-parser
+</xsl:text>
+    </xsl:if>
     <xsl:apply-templates
       select=".//screen[not(@role) or
                         @role != 'nodump']/userinput[