Historically we have been (more-or-less consistently, sometimes forgetting
some files) updating the end year of the copyright statements at the
beginning of a new year.
We're naturally not alone in that. Recently this was discussed in curl, and
it turns out that copyright years are not really required:
https://daniel.haxx.se/blog/2023/01/08/copyright-without-years/
So drop the years and simplify the copyright statements. While we're at it,
also ensure the same syntax (capital C, email address) is used everywhere.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
