Move to groups.io

Several of my groups had a home on Yahoo, but they are winding down their groups service, so I have migrated these to groups.io.  Many people have now moved.

Starting groups "from scratch" is free in .io, whereas transferring old Yahoo groups costs $110 in the first year. I started new groups and asked people to transfer files and photos they believe are needed, but to keep the size to a minimum. The historical messages will be lost though.

See https://groups.io/