FreeBSD web build failed on red.freebsd.org

[World Wide Web Owner]

===> doc/articles/linux-emulation (all)
===> doc/articles/linux-users (all)
===> doc/articles/mailing-list-faq (all)
===> doc/articles/mh (all)
===> doc/articles/nanobsd (all)
===> doc/articles/new-users (all)
===> doc/articles/p4-primer (all)
===> doc/articles/pam (all)
===> doc/articles/port-mentor-guidelines (all)
===> doc/articles/portbuild (all)
===> doc/articles/pr-guidelines (all)
===> doc/articles/problem-reports (all)
===> doc/articles/rc-scripting (all)
===> doc/articles/relaydelay (all)
===> doc/articles/releng (all)
===> doc/articles/releng-packages (all)
===> doc/articles/remote-install (all)
===> doc/articles/serial-uart (all)
===> doc/articles/solid-state (all)
===> doc/articles/vm-design (all)
===> doc/articles/wp-toolbox (all)
===> doc/books (all)
===> doc/books/arch-handbook (all)
===> doc/books/design-44bsd (all)
===> doc/books/dev-model (all)
===> doc/books/developers-handbook (all)
===> doc/books/faq (all)
===> doc/books/fdp-primer (all)
===> doc/books/handbook (all)
/usr/bin/perl /usr/local/share/sgml/docbook/dsssl/modular/bin/collateindex.pl -i doc-index -N -o index.xml
/usr/bin/env SP_ENCODING=ISO-8859-1 /usr/local/bin/jade -V html-index -ioutput.html -d /w/www/build/head/share/xml/default.dsl -ifreebsd.urls.relprefix.4 -V %generate-legalnotice-link% -V %generate-docformat-navi-link% -ioutput.html.images  -i chap.index -i chap.audit -i chap.bsdinstall -i chap.dtrace -i chap.advanced-networking -i chap.basics -i chap.bibliography -i chap.boot -i chap.config -i chap.cutting-edge -i chap.desktop -i chap.disks -i chap.eresources -i chap.firewalls -i chap.filesystems -i chap.geom -i chap.install -i chap.introduction -i chap.jails -i chap.kernelconfig -i chap.l10n -i chap.linuxemu -i chap.mac -i chap.mail -i chap.mirrors -i chap.multimedia -i chap.network-servers -i chap.pgpkeys -i chap.ports -i chap.ppp-and-slip -i chap.printing -i chap.security -i chap.serialcomms -i chap.users -i chap.vinum -i chap.virtualization -i chap.x11 -i chap.freebsd-glossary -D /w/www/build/head/en_US.ISO8859-1/books/handbook/../../../share/images/books/handbook -D /usr/obj/w/
 www/build/head/en_US.ISO8859-1/books/handbook -c /w/www/build/head/en_US.ISO8859-1/share/xml/catalog -c /w/www/build/head/share/xml/catalog -c /usr/local/share/sgml/docbook/dsssl/modular/catalog -c /usr/local/share/sgml/iso8879/catalog -c /usr/local/share/sgml/jade/catalog -c /usr/local/share/sgml/catalog.ports -t sgml /usr/local/share/sgml/docbook/dsssl/modular/dtds/decls/xml.dcl /w/www/build/head/en_US.ISO8859-1/books/handbook/book.xml > /dev/null
/usr/local/bin/jade:/w/www/build/head/en_US.ISO8859-1/books/handbook/boot/chapter.xml:578:30:E: end tag for "xref" omitted, but OMITTAG NO was specified
/usr/local/bin/jade:/w/www/build/head/en_US.ISO8859-1/books/handbook/boot/chapter.xml:577:39: start tag was here
/usr/local/bin/jade:/w/www/build/head/en_US.ISO8859-1/books/handbook/boot/chapter.xml:578:49:E: end tag for element "xref" which is not open
*** Error code 1

Stop in /w/www/build/head/en_US.ISO8859-1/books/handbook.
*** Error code 1

Stop in /w/www/build/head/en_US.ISO8859-1/books.
*** Error code 1

Stop in /w/www/build/head/en_US.ISO8859-1.
*** Error code 1

Stop in /w/www/build/head/en_US.ISO8859-1/htdocs/doc.
*** Error code 1

Stop in /w/www/build/head/en_US.ISO8859-1/htdocs.
       48.33 real        42.18 user         4.74 sys