How do I indicate RETIRE or HANDOFF for a port?

Hello,

I am the maintainer of several ports.
https://portscout.freebsd.org/bokutin@bokut.in.html

Is there any way to indicate which ports I have quit using and 
maintaining?

In CPAN, it is possible.
https://github.com/Perl-Toolchain-Gang/toolchain-site/blob/master/lancaster-consensus.md#flagging-abandoned-modules-and-modules-requesting-help

Thanks,