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.

1986/applin/applin.orig.c

@@ -0,0 +1,15 @@
+cat =13 /*/ >/dev/null 2>&1; echo "Hello, world!"; exit
+*
+*  This program works under cc, f77, and /bin/sh.
+*
+*/; main() {
+      write(
+cat-~-cat
+     /*,'(
+*/
+     ,"Hello, world!"
+     ,
+cat); putchar(~-~-~-cat); } /*
+     ,)')
+      end
+*/