FreeBSD web build failed on build-web.stream.freebsd.org

[User Www-data]

===> ../../de_DE.ISO8859-1/htdocs/releases/5.1R
===> ../../de_DE.ISO8859-1/htdocs/releases/5.2R
===> ../../de_DE.ISO8859-1/htdocs/releases/5.3R
===> ../../de_DE.ISO8859-1/htdocs/security
===> ../../de_DE.ISO8859-1/htdocs/snapshots
===> ../../de_DE.ISO8859-1/htdocs/support
===> ../../de_DE.ISO8859-1/htdocs/ports
cd /home/www/build/head/de_DE.ISO8859-1/htdocs/ports;  make  DIRPRFX=../../de_DE.ISO8859-1/htdocs/ -f /home/www/build/head/de_DE.ISO8859-1/htdocs/ports/Makefile.inc0 all
cd growth;  make  DIRPRFX=../../de_DE.ISO8859-1/htdocs/ all
cd /home/www/build/head/de_DE.ISO8859-1/htdocs/ports/growth/../../../../share/tools/portsgrowth;  make  DIRPRFX=../../de_DE.ISO8859-1/htdocs/ DIRPRFX=../../de_DE.ISO8859-1/htdocs/ports/ all
===> ../../de_DE.ISO8859-1/htdocs/doc
===> ../../de_DE.ISO8859-1/htdocs/doc/articles (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/contributing (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/contributing-ports (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/explaining-bsd (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/freebsd-update-server (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/laptop (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/linux-comparison (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/nanobsd (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/new-users (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/port-mentor-guidelines (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/articles/solid-state (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/books (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/books/developers-handbook (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/books/faq (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/books/fdp-primer (all)
===> ../../de_DE.ISO8859-1/htdocs/doc/books/handbook (all)
env XML_CATALOG_FILES="file:///home/www/build/head/de_DE.ISO8859-1/books/handbook/catalog-cwd.xml  file:///home/www/build/head/de_DE.ISO8859-1/share/xml/catalog.xml  file:///home/www/build/head/share/xml/catalog.xml  file:///home/www/build/head/share/xml/catalog-common.xml  file:///usr/local/share/xml/catalog" /usr/local/bin/xmllint --nonet --noent --valid --dropdtd --xinclude /home/www/build/head/de_DE.ISO8859-1/books/handbook/book.xml > book.parsed.xml.tmp
/home/www/build/head/de_DE.ISO8859-1/books/handbook/mirrors.xml.cvsup.inc:2: element variablelist: validity error : Element variablelist content does not follow the DTD, expecting (((title | titleabbrev)* , info?) , (itemizedlist | orderedlist | procedure | simplelist | variablelist | segmentedlist | glosslist | bibliolist | calloutlist | qandaset | example | figure | table | equation | informalexample | informalfigure | informaltable | informalequation | sidebar | blockquote | address | epigraph | mediaobject | screenshot | task | productionset | constraintdef | msgset | screen | literallayout | programlistingco | screenco | programlisting | synopsis | bridgehead | remark | revhistory | indexterm | funcsynopsis | classsynopsis | methodsynopsis | constructorsynopsis | destructorsynopsis | fieldsynopsis | cmdsynopsis | caution | important | note | tip | warning | anchor | para | formalpara | simpara | annotation)* , varlistentry+), got 
<variablelist xmlns:xlink="http://www.w3.org/1999/xlink"/>
                                                          ^
*** [book.parsed.xml] Error code 4

Stop in /home/www/build/head/de_DE.ISO8859-1/books/handbook.
*** [all] Error code 1

Stop in /home/www/build/head/de_DE.ISO8859-1/books.
*** [all] Error code 1

Stop in /home/www/build/head/de_DE.ISO8859-1.
*** [all-all] Error code 1

Stop in /home/www/build/head/de_DE.ISO8859-1/htdocs/doc.
*** [all] Error code 1

Stop in /home/www/build/head/de_DE.ISO8859-1/htdocs.
*** [all] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1/htdocs.
       31.62 real        19.91 user        12.39 sys