property SecureContextOptions.dhparam
Usage in Deno
```typescript
import { type SecureContextOptions } from "node:node__tls.d.ts";
```
`'auto'` or custom Diffie-Hellman parameters, required for non-ECDHE perfect forward secrecy.
If omitted or invalid, the parameters are silently discarded and DHE ciphers will not be available.
ECDHE-based perfect forward secrecy will still be available.