Merge commits '3a106966 8f0c6f15 ' into temp-merge-851

src/tests.c

@@ -5802,6 +5802,15 @@ int main(int argc, char **argv) {
     /* find iteration count */
     if (argc > 1) {
         count = strtol(argv[1], NULL, 0);
+    } else {
+        const char* env = getenv("SECP256K1_TEST_ITERS");
+        if (env) {
+            count = strtol(env, NULL, 0);
+        }
+    }
+    if (count <= 0) {
+        fputs("An iteration count of 0 or less is not allowed.\n", stderr);
+        return EXIT_FAILURE;
     }
     printf("test count = %i\n", count);