Upgrade SpamAssassin to 3.1.0

perl -MCPAN -e 'install Mail::SpamAssassin'
perl -MCPAN -e 'install Mail::SPF::Query'
perl -MCPAN -e 'install Mail::DomainKeys::Message'
perl -MCPAN -e 'install Crypt::OpenSSL::Bignum'

cd /usr/lib/perl5/site_perl/5.8.3/Mail/SpamAssassin/Plugin/
wget -c 'http://issues.apache.org/SpamAssassin/attachment.cgi?id=3210&action=view'
patch -p4 < attachment.cgi\?id\=3210\&action\=view

from etc/mail/spamassassin*.pre enable:

loadplugin Mail::SpamAssassin::Plugin::DCC
loadplugin Mail::SpamAssassin::Plugin::Razor2
loadplugin Mail::SpamAssassin::Plugin::DomainKeys

Run spamassassin --lint to verify everything is OK.