sudo make FORMATS=html
Warning: Object directory not changed from original /usr/doc/head
===> en_US.ISO8859-1 (all)
Warning: Object directory not changed from original /usr/doc/head/en_US.ISO8859-1
===> en_US.ISO8859-1/articles (all)
Warning: Object directory not changed from original /usr/doc/head/en_US.ISO8859-1/articles
===> en_US.ISO8859-1/articles/bsdl-gpl (all)
install /usr/doc/head/share/xml/catalog-cwd.xml /usr/doc/head/en_US.ISO8859-1/articles/bsdl-gpl/catalog-cwd.xml
echo '<!ENTITY base "..">' >> /usr/doc/head/en_US.ISO8859-1/articles/bsdl-gpl/autogen.ent
env XML_CATALOG_FILES="file:///usr/doc/head/en_US.ISO8859-1/articles/bsdl-gpl/catalog-cwd.xml  file:///usr/doc/head/en_US.ISO8859-1/share/xml/catalog.xml  
file:///usr/doc/head/share/xml/catalog.xml  file:///usr/local/share/xml/catalog" /usr/local/bin/xmllint --nonet --noent --valid --dropdtd --xinclude 
/usr/doc/head/en_US.ISO8859-1/articles/bsdl-gpl/article.xml > article.parsed.xml.tmp
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsa.ent
file:///usr/doc/head/share/xml/iso8879.ent:9: warning: failed to load external entity "http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsa.ent"
%iso-amsa.ent;
              ^
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsb.ent
file:///usr/doc/head/share/xml/iso8879.ent:14: warning: failed to load external entity "http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsb.ent"
%iso-amsb.ent;
              ^
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsc.ent
file:///usr/doc/head/share/xml/iso8879.ent:19: warning: failed to load external entity "http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsc.ent"
%iso-amsc.ent;
              ^
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsn.ent
file:///usr/doc/head/share/xml/iso8879.ent:24: warning: failed to load external entity "http://www.oasis-open.org/docbook/xmlcharent/current/iso-amsn.ent"
%iso-amsn.ent;
              ^
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xmlcharent/current/iso-amso.ent
file:///usr/doc/head/share/xml/iso8879.ent:29: warning: failed to load external entity "http://www.oasis-open.org/docbook/xmlcharent/current/iso-amso.ent"

#[SNIP]

I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xmlcharent/current/iso-tech.ent
file:///usr/doc/head/share/xml/iso8879.ent:99: warning: failed to load external entity "http://www.oasis-open.org/docbook/xmlcharent/current/iso-tech.ent"
%iso-tech.ent;

Entity: line 5: parser error : Entity 'trade' not defined
  designations have been followed by the <quote>&trade;</quote> or the
                                                       ^
Entity: line 6: parser error : Entity 'reg' not defined
  <quote>&reg;</quote> symbol.</para>
              ^
Entity: line 6: parser error : chunk is not well balanced
  <quote>&reg;</quote> symbol.</para>
                                     ^
/usr/doc/head/en_US.ISO8859-1/articles/bsdl-gpl/article.xml:18: parser error : Entity 'tm-attrib.general' failed to parse
      &tm-attrib.general;
                         ^
*** Error code 1

Stop.
make[3]: stopped in /usr/doc/head/en_US.ISO8859-1/articles/bsdl-gpl
*** Error code 1

Stop.
make[2]: stopped in /usr/doc/head/en_US.ISO8859-1/articles
*** Error code 1

Stop.
make[1]: stopped in /usr/doc/head/en_US.ISO8859-1
*** Error code 1

Stop.
make: stopped in /usr/doc/head