#paste at the end of apche.conf
Alias /bugzilla3 /usr/share/bugzilla3/web

<Directory /cgi-bin/bugzilla3/>
    AddHandler cgi-script .cgi
    Options +Indexes +ExecCGI
    DirectoryIndex index.cgi
    AllowOverride Limit
</Directory>

RedirectMatch ^/cgi-bin/bugzilla3[/]*$ /cgi-bin/bugzilla3/index.cgi