If made release on a box behind the firewall or nat gate, pkg_add cdrtools would failed, because of fetching package failed.
Add trying in passive mode after the first trying failed.
How-To-Repeat: make release on a box behind firewall
This change doesn't make sense given the context that I briefly
saw in the script. If you know this is going to be an issue, why don't
you set passive mode in your FTP configuration by default?