46: `--libcurl` output carries `--insecure` across `--next` boundaries

When `--libcurl` generates C source for a command that uses `--next` to separate multiple operations, local options from earlier operations leak into later ones. Specifically, if the first operation uses `--insecure` and the second does not, the generated program silently skips TLS certificate and …

curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);