tree-wide: use -EBADF more

src/cgroups-agent/cgroups-agent.c

@@ -18,7 +18,7 @@ int main(int argc, char *argv[]) {
         size_t l;
         int r;
 
-        r = rearrange_stdio(-1, -1, -1);
+        r = make_null_stdio();
         if (r < 0) {
                 log_error_errno(r, "Failed to connect stdin/stdout/stderr with /dev/null: %m");
                 return EXIT_FAILURE;