restore *.orig.c to each entry

Under each yyyy/dir there is a file of the form '*.orig.c'
containing the original source code, or as close as we can
get to the original source code.

1991/fine/fine.orig.c

@@ -0,0 +1 @@
+main(a,b){while((a=getchar())+1)putchar((b=64^a&223)&&b<27?a&96|(b+12)%26+1:a);}