Add preview of 1984-2019

The 2020 winners are hinted it, but the source code is not there,
nor are the hints. Someone could look into the HTML and
see what was commented out, but that is not a problem because
WHO won is known and the name of their AWARD is known already.
Moreover a number of the winners have talked about what their
entirs do, so the commented out spoiler text is not a bit problem.

One will find HTML commented out with:

    <!-- XXX remove when 2020 is ready
    2020 links here
    XXX remove when 2020 is ready -->

The "XXX remove when 2020 is ready" string is found at the
start and end comment blocks.  Again, soneone could read
what was commented out, but that is OK since most of that
information is known or can be known.  The following files
have such HTML comment blocks in them.

    ./winners.html
    ./years-spoiler.html
    ./years.html

In addition, ./all/summary.txt was modified to not
include the 2020 entries for the momemt.

The 2020 winner code AND write-ups are NOT part of this set.

p.s. The all/all.tar.bz2 does not contain the 2020 source code (yet?).

1987/wall/Makefile

@@ -0,0 +1,30 @@
+# %W% %G% %U%
+#
+# 1987 makefile
+#
+# Copyright (c) 1987, 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
+# from Landon Curt Noll and Larry Bassel.
+
+
+SHELL= /bin/sh
+WINNERS= wall
+
+# for System V style systems
+OPSYS= -Dindex=strchr
+# for BSD style systems
+#OPSYS=
+
+all: ${WINNERS}
+
+wall: wall.c
+	cc $? -o $@
+
+clean:
+	rm -f core
+clobber: clean
+	rm -f ${WINNERS}
+install: all
+	@echo are you kidding'??'

1987/wall/hint.html

@@ -0,0 +1,35 @@
+<h1>Most Useful Obfuscation</h1>
+
+<p>Larry Wall<br>
+Unisys - System Development Group Santa Monica<br>
+9132 Kester Ave<br>
+Panorama City, CA  91402  USA</p>
+
+<h2>Judges' comments:</h2>
+
+<h3>Try:</h3>
+
+<pre><code>lwall | bc | lwall
+input:  x*x
+input:  c^2
+</code></pre>
+
+<h3>Also try:</h3>
+
+<pre><code>lwall | bc   and   lwall | cat
+</code></pre>
+
+<p>What we found amazing was how the flow of control was transferred
+between subroutines.  Careful inspection will show that the array of
+pointers to functions named &lsquo;vi&rsquo; refers to functions which seem to not
+be directly called.  Even so, these pointers to functions are being
+used as an argument to signal.  Can you determine why this is being
+done and how it is being exploited?</p>
+
+<p>Some compilers complained about this file, so we changed: &lsquo;=++I&rsquo; to &lsquo;= ++I&rsquo;.</p>
+
+<p>Copyright &copy; 1987, Landon Curt Noll &amp; 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.</p>

1987/wall/hint.text

@@ -0,0 +1,31 @@
+# Most Useful Obfuscation
+
+Larry Wall  
+Unisys - System Development Group Santa Monica  
+9132 Kester Ave  
+Panorama City, CA  91402  USA  
+
+## Judges' comments:
+
+### Try:
+	lwall | bc | lwall
+	input:	x*x
+	input:	c^2
+
+### Also try:
+	lwall | bc   and   lwall | cat
+
+What we found amazing was how the flow of control was transferred
+between subroutines.  Careful inspection will show that the array of
+pointers to functions named 'vi' refers to functions which seem to not
+be directly called.  Even so, these pointers to functions are being
+used as an argument to signal.  Can you determine why this is being
+done and how it is being exploited?
+
+Some compilers complained about this file, so we changed: '=++I' to '= ++I'.
+
+Copyright (c) 1987, 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.

1987/wall/wall.c

@@ -0,0 +1,18 @@
+#define iv 4 
+#define v ;(void
+#define XI(xi)int xi[iv*'V'];
+#define L(c,l,i)c(){d(l);m(i);}
+#include <stdio.h>
+int*cc,c,i,ix='\t',exit(),X='\n'*'\d';XI(VI)XI(xi)extern(*vi[])(),(*
+signal())();char*V,cm,D['x'],M='\n',I,*gets();L(MV,V,(c+='d',ix))m(x){v)
+signal(X/'I',vi[x]);}d(x)char*x;{v)write(i,x,i);}L(MC,V,M+I)xv(){c>=i?m(
+c/M/M+M):(d(&M),m(cm));}L(mi,V+cm,M)L(md,V,M)MM(){c=c*M%X;V-=cm;m(ix);}
+LXX(){gets(D)||(vi[iv])();c=atoi(D);while(c>=X){c-=X;d("m");}V="ivxlcdm"
++iv;m(ix);}LV(){c-=c;while((i=cc[*D=getchar()])>-I)i?(c?(c<i&&l(-c-c,
+"%d"),l(i,"+%d")):l(i,"(%d")):(c&&l(M,")"),l(*D,"%c")),c=i;c&&l(X,")"),l
+(-i,"%c");m(iv-!(i&I));}L(ml,V,'\f')li(){m(cm+!isatty(i=I));}ii(){m(c=cm
+= ++I)v)pipe(VI);cc=xi+cm++;for(V="jWYmDEnX";*V;V++)xi[*V^' ']=c,xi[*V++]
+=c,c*=M,xi[*V^' ']=xi[*V]=c>>I;cc[-I]-=ix v)close(*VI);cc[M]-=M;}main(){
+(*vi)();for(;v)write(VI[I],V,M));}l(xl,lx)char*lx;{v)printf(lx,xl)v)
+fflush(stdout);}L(xx,V+I,(c-=X/cm,ix))int(*vi[])()={ii,li,LXX,LV,exit,l,
+d,l,d,xv,MM,md,MC,ml,MV,xx,xx,xx,xx,MV,mi};