Properly render asciidoc "callouts" in git man pages.

Adds an xsl fragment to render docbook callouts when
converting to man page format.  Update the Makefile
to have "xmlto" use it when generating man pages.

Signed-off-by: Sean Estabrooks <seanlkml@sympatico.ca>

Documentation/Makefile

@@ -79,7 +79,7 @@ clean:
 	asciidoc -b xhtml11 -d manpage -f asciidoc.conf $<
 
 %.1 %.7 : %.xml
-	xmlto man $<
+	xmlto -m callouts.xsl man $<
 
 %.xml : %.txt
 	asciidoc -b docbook -d manpage -f asciidoc.conf $<

Documentation/callouts.xsl

@@ -0,0 +1,16 @@
+<!-- callout.xsl: converts asciidoc callouts to man page format -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+<xsl:template match="co">
+	<xsl:value-of select="concat('\fB(',substring-after(@id,'-'),')\fR')"/>
+</xsl:template>
+<xsl:template match="calloutlist">
+	<xsl:text>.sp&#10;</xsl:text>
+	<xsl:apply-templates/>
+	<xsl:text>&#10;</xsl:text>
+</xsl:template>
+<xsl:template match="callout">
+	<xsl:value-of select="concat('\fB',substring-after(@arearefs,'-'),'. \fR')"/>
+	<xsl:apply-templates/>
+	<xsl:text>.br&#10;</xsl:text>
+</xsl:template>
+</xsl:stylesheet>