SourceForge says, “With a single click, projects can opt-in to switch their web hosting from HTTP to HTTPS.”
SourceForge has added a feature that gives project websites the opportunity to opt-in to using SSL HTTPS encryption. Project admins can find this option in the Admin page under “HTTPS.”
Opting-in will also trigger a domain name change, from http://name.sourceforge.net to https://name.sourceforge.io. Visitors using the old domain will automatically redirect to the new domain.