[PostGIS] #5588: stable-3.4 branch fails to find docbook XSL no Woodie

[PostGIS]

#5588: stable-3.4 branch fails to find docbook XSL no Woodie
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  Reporter:  strk       |      Owner:  robe
      Type:  defect     |     Status:  new
  Priority:  medium     |  Milestone:  PostGIS 3.3.5
 Component:  buildbots  |    Version:  3.3.x
Resolution:             |   Keywords:
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Comment (by strk):

 I'm trying to build in the postgis-build-test docker container on woodie-
 server and the configure script there is able to find the stylesheets, but
 still doesn't set the appropriate variable:

 {{{
 checking for html/docbook.xsl in URI
 http://cdn.docbook.org/release/xsl/current...... not found
 checking for html/docbook.xsl in URI
 http://docbook.sourceforge.net/release/xsl-ns/current...... found
 ...
  -------- Documentation Generation --------
   xsltproc:             /usr/bin/xsltproc
   xsl style sheets:
   dblatex:              /usr/bin/dblatex
   convert:              /usr/bin/convert
   mathml2.dtd:          /usr/share/xml/schema/w3c/mathml/dtd/mathml2.dtd
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5588#comment:3>
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