nixpkgs/doc: generate consistent docbook ids

to make diff'ing different versions of the generated docs less noisy

Changed files
+1
doc
doc-support
+1
doc/doc-support/parameters.xml
···
<xsl:param name="toc.section.depth" select="0" />
<xsl:param name="admon.style" select="''" />
<xsl:param name="callout.graphics.extension" select="'.svg'" />
</xsl:stylesheet>
···
<xsl:param name="toc.section.depth" select="0" />
<xsl:param name="admon.style" select="''" />
<xsl:param name="callout.graphics.extension" select="'.svg'" />
+
<xsl:param name="generate.consistent.ids" select="1" />
</xsl:stylesheet>