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.

1991/ant/README.md

@@ -122,8 +122,11 @@ work correctly, however.
 
 [net90]	"Editor 101/102" articles from comp.editors
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+## 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/

1991/brnstnd/README.md

@@ -181,8 +181,11 @@ matching, reading from files into strings, and encrypting the string
 pool to further confuse the judges. I don't think I can fit this into
 the size limit, unfortunately.
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+## 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/

1991/buzzard/README.md

@@ -86,9 +86,11 @@ it) or when you type ^D.
 
     Gur cebtenz nffhzrf gung gnof ner frg gb 8 punenpgref.
 
+## Copyright and CC BY-SA 4.0 License:
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+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/

1991/cdupont/README.md

@@ -46,9 +46,11 @@ Spoiler, rot13 to read:
     Guvf jnl, nal zrffntr pna or zvkrq vagb n pbqr, fvapr gur xrlf nyybj
     lbh gb cynpr gur zrnavatshy yrggref jurerire lbh jnag.
 
+## Copyright and CC BY-SA 4.0 License:
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+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/

1991/davidguy/README.md

@@ -111,9 +111,11 @@ result is that the time to transfer the bits to the X server, and
 for the X server to draw them on the screen, dominates the time to
 compute the next generation.
 
+## Copyright and CC BY-SA 4.0 License:
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+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/

1991/dds/README.md

@@ -84,8 +84,11 @@ Can you figure out how the compiler works?  Hint:
     course the 's' string is encoded by adding one to every character of it just
     to confuse you).
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+## 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/

1991/fine/README.md

@@ -77,10 +77,12 @@ Here's about how it does it:  [rot13 to read]
     bs gur cebtenz.  Nyfb, vs lbh xabj lbh ner bayl qrnyvat jvgu frira ovg
     qngn, gur fvmr pna or erqhprq ol bar olgr.  Gurfr ner yrsg nf rkrepvfrf
     sbe gur fghqrag.
-    
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+## 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/

1991/rince/README.md

@@ -64,8 +64,11 @@ enjoyment high.
     znc).  Gb haybpx n qbbe fvzcyl chfu n xrl vagb gur pbeerfcbaqvat qbbe.
     Gnxr pner gung vg'f snpvat va gur pbeerpg qverpgvba.
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+## 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/

1991/westley/README.md

@@ -178,8 +178,11 @@ next move, recompile `nextmove.c` and play it again:
     sbhaq.  N grzcyngr vf fpnaarq sebz obggbz gb gbc, evtug gb yrsg
     (v.r.  zbir 9 vf grfgrq svefg, gura 8, qbja gb zbir 1).
 
-Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+## 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/