[bug-inetutils] copyright notices...

[Alfred M. Szmidt]

I got bored for a few days and updated all copyright notices (added
missing years, reordered them so that the FSF notice is at the top,
and added missing notices to a bunch of files, plus some other stuff).
I'd appreciate it if nobody pushed any changes during the next few
days until I push mine, seeing that this modifies almost all files in
the repository.