[RFA/doco 3/3] Document new procedure for updating copyright years

[Eli Zaretskii]

> From: Joel Brobecker <brobecker@adacore.com>
> Cc: Joel Brobecker <brobecker@adacore.com>
> Date: Wed,  4 Jan 2012 12:19:06 +0400
> 
> We now use a different script to perform the update.  This patch
> updates the procedure in our documentation
> 
> gdb/doc/ChangeLog:
> 
>         * gdbint.texinfo (Start of New Year Procedure): Update
>         to replace use of copyright.sh by use of copyright.py.
> 
> OK to commit?

Yes, with one comment:

> -Run the @file{copyright.sh} script to add the new year in the copyright
> -notices of most source files.  This script requires Emacs 22 or later to
> -be installed.
> ...
> +Run the @file{copyright.py} Python script to add the new year in the copyright
> +notices of most source files.

Should we tell which versions of Python are required to run the
script, like the old text said about Emacs?

Thanks.