note old Email, header formatting, improve copyright and license

For the top level and year level README.md, where email are found,
a note was added to the effect that email addresses found above are
for historical purposes only, and should not be used today.

Old references to asking for fixes, comments, when content was used,
and next contest links were replaced with a general reference to the FAQ.

Harmonized the Copyright and License and copyright dates.
Now using Creative Commons "CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0
International".

The above Creative Commons will become the standard for the IOCCC.
Replaced old `png/by-sa-3.0-88x31.png` with a new ` png/by-sa.88x31.png` icon.
Updated the top level HTML files to use the license.

README.md

@@ -17,16 +17,22 @@ temp-test-ioccc GitHub repo.
 XXX - The text from the top down to the _What follows is the actual README.md file_
 line will be removed when this web site becomes official - XXX
 
-## What follows is the actual README.md file
+## What follows is the actual README.md file - Remove from top down to this line - XXX
 # About the IOCCC winner GitHub repository
 
-The [IOCCC winners GitHub repository](https://github.com/ioccc-src/winner) are the
+The [official IOCCC winners GitHub repository](https://github.com/ioccc-src/winner) are the
 official winners of the **International Obfuscated C Code Contest (IOCCC)**, the
 Internet's oldest ongoing contest.
 
-For information about the IOCCC, see the [goals of the
-contest](https://www.ioccc.org/index.html#goals).
+**IMPORTANT NOTE**: See [contact.html](/contact.html) for up to date contact details
+as well as details on how to provide fixes to any of the entries.
+See also [the IOCCC FAQ](/faq.html) for addition information on the IOCCC.
 
-We, the [IOCCC Judges](https://www.ioccc.org/judges.html), recommend that you view
-this information via the [Official IOCCC web
-site](https://www.ioccc.org/index.html).
+
+# Copyright and License
+
+Copyright (C) 2020,2023, Landon Curt Noll. All Rights Reserved.
+This work is licensed under a [Creative Commons CC BY-SA 4.0 DEED Attribution-ShareAlike
+4.0 International](https://creativecommons.org/licenses/by-sa/4.0/) license.
+If you do use this work in some form, the [IOCCC judges](/judges.html) would appreciate
+(but does not require) if you were to [send us a note about your use](/contact.html).