I hope you will follow:
https://my.fsf.org/donate/ ( unless other exists )
When Decommissioned also then in the details section:
If you have time and interest in resurrecting this GNU package, please contact: mailto:firstname.lastname@example.org.
For GNU packages I also add this:
Selection from the FSF shop
If you have corrections to this entry or questions about it, please contact: mailto:email@example.com
When decommissioned on top of that:
As related project to GNU packages:
https://www.fsf.org/resources/service/ ( unless other exists )
When a project is on Savannah:
Did not do it, but now I would also add this to non-GNU entries:
If you have corrections to this entry or questions about it, please contact: mailto:firstname.lastname@example.org
Standard reference links, (Ref) =reference (R) =redirect, may not all be the same as the entry itself.
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