cannot make gnucash-docs-1.8.3

[Willi Tonsern]

I installed gnucash 1.8.8 without problems worth mentioning and I can 
say now the application works fine.
This done I started to install gnucash-docs-1.8.3 (I hope, that is the 
latest version?):
the configure-script finished well but make runs in difficulties: 
somebody tries to connect to www.oasis-open.org to get any docbook....
and the most exciting problem for me: not only "make" cannot connect to 
ww.oasis-open.org but "mozilla" cannot do also (- whereas "ping" can 
connect as well as MS-IE).
This is the first time I see such a behaviour on my PC.

I show you the problem report written to stdout from "make" and I hope 
somebody can help me
W. Tonsern

####################### problem report ############################
my_prompt# make
make  all-recursive
make[1]: Entering directory `/opt/gnucash-docs-1.8.3'
Making all in help
make[2]: Entering directory `/opt/gnucash-docs-1.8.3/help'
Making all in C
make[3]: Entering directory `/opt/gnucash-docs-1.8.3/help/C'
/bin/sh ../../mkinstalldirs gnucash-help; \
for file in gnucash-help.xml; do \
 xsltproc -o gnucash-help/ --param use.id.as.filename 1 \
  ../../xsl/general-customization.xsl ./$file; \
  done
  xmlNanoHTTPConnectAttempt: Connect attempt timed 
out../gnucash-help.xml:12: warning: failed to load external entity 
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"
  ]>
   ^
   Writing titlepage.html for article(help)
   Writing intro-to-gnucash.html for sect1(intro-to-gnucash)
   Writing getting-started.html for sect1(getting-started)
   Writing usage.html for sect1(usage)
   Writing custom-gnucash.html for sect1(custom-gnucash)
   Writing fdl-preamble.html for sect1(fdl-preamble)
   Error: no ID for constraint linkend: fdl-document.
   Error: no ID for constraint linkend: fdl-secondary.
   Error: no ID for constraint linkend: fdl-document.
   Error: no ID for constraint linkend: fdl-document.
   Error: no ID for constraint linkend: fdl-document.