put all README.md files under CC BY-SA 4.0 License

This will make is easier for others to share README.md
files while requiring them to attribute the file
when using it.

1996/august/README.md

@@ -232,3 +232,12 @@ Terminals are in quotes, () is used for bracketing.
 *****
 
 Well, that is enough ranting for now.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/dalbec/README.md

@@ -84,3 +84,12 @@ This program is obfuscated:
     - to compute powers in modular arithmetic
 
     - to recursively call itself in the main loop
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/eldby/README.md

@@ -28,3 +28,12 @@ in a very small chunk of code.
 This program shows flying spheres. The program eats CPU on lesser
 equipped systems. The program will run until termination. Terminal 
 must be vt100 or better with 80 columns and 24 rows or more.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/gandalf/README.md

@@ -49,3 +49,12 @@ For mis-leading C pre-processor output, try:
 ## Author's comments
 
 The program requires an ASCII system.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/huffman/README.md

@@ -54,3 +54,12 @@ characters.  The user is encouraged to use the program's source as input
 to the executable.
 
 This program is best appreciated on a tactile monitor.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/jonth/README.md

@@ -41,3 +41,11 @@ try xrefresh command.
 
 Have a nice(1) day.
 
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/rcm/README.md

@@ -67,3 +67,12 @@ source file size to execution time."
 of constants and tables be defined.  Which means the program
 itself had to be squeezed down to about 1,100 IOCCC countable
 bytes."
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/schweikh1/README.md

@@ -119,3 +119,12 @@ Usage
 -----
 
 The program is run without arguments. It prints all dates in order.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/schweikh2/README.md

@@ -139,4 +139,11 @@ For a nice printout try this on your Bourne compatible shell:
 
 	% while :; do grep -v '#' schweikh2.c; done
 
+## Copyright and CC BY-SA 4.0 License:
 
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/schweikh3/README.md

@@ -162,3 +162,12 @@ system that I observe thrashing (Linux) this works (although the
 value returned by time seems to 'hang' sometimes when the OS thrashes.
 Exceeding a threshold of 5 seconds may be detected only after half a
 minute or so.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/

1996/westley/README.md

@@ -115,3 +115,12 @@ written into the `clock_image`.
 Note that the hands move in a quantum fashion; 3:59 looks
 deceptively like 2:59, since the hour hand will be at the 3
 position.  It won't move until both hands click over at 4:00.
+
+## Copyright and CC BY-SA 4.0 License:
+
+This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
+You are free to share and adapt this file under the terms this license:
+
+    Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+
+For more information, see: https://creativecommons.org/licenses/by-sa/4.0/