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.

1998/schweikh2/schweikh2.orig.c

@@ -0,0 +1,20 @@
+#define _POSIX_SOURCE /* you are not supposed to understand this */
+#define O(OOO,OO0,O00,O0O,OO,O0)\0##O0O%:%:OO\0##O0%:%:OOO\0##OO0%:%:O00
+#include<signal.h>
+static volatile sig_atomic_t One;
+#include<stdlib.h>
+#include<unistd.h>
+#define Zero(NULL)#NULL
+#define ONE(One) Zero(One)
+in??/
+t
+??=line 10 ONE(O(1,1,2,6,0,6))
+main (register zero, char **ONE)
+%:
+<% switch (sizeof __FILE__ < zero) case 1: return One /= zero;
+{ auto one = zero = atoi (ONE<:zero-1:>);
+do for (one += alarm (One |= (signal (__LINE__, (void(*)(register))main)
+!= SIG_ERR)); One; ++one);
+while (zero -= write (1, __FILE__+(one&1), 1));
+return write (1, 1+__FILE__+1, 1) != 1;
+%>}