Don't benchmark strstr - this test can hang, and the system one will be at
least as fast anyway.

--- procmail-3.22/src/autoconf	2001-09-11 05:55:46.000000000 +0100
+++ procmail-3.22/src/autoconf	2025-07-03 21:40:27.820421772 +0100
@@ -1204,7 +1204,7 @@
 int main(argc,argv)int argc;const char*argv[];
 { if(argc==1)
    { char*haystack;
-#ifdef BENCHSIZE
+#if 0
      if(haystack=malloc(BENCHSIZE))
       { unsigned c1,c2,i;time_t t;
 	unsigned long iter,titer,syscnt;