New API function: ad_docbook_xml_to_html
This function converts DocBook XML as used in the OpenACS
documentation to HTML. This is not a full implementation of all
possible DocBook markup, but just a subset sufficient for rendering a
substantial subset of the OpenACS documentation.
The function can be used via
set html [ad_html_text_convert -from application/docbook+xml -to text/html $text]
or
set txt [ad_html_text_convert -from application/docbook+xml -to text/plain $text]