//! # MLDv2: Multicast Layer Discovery for IPv6 Version 2
//!
//! Adds support for Source-Specific Multicast (SSM) to MLDv1.
//!
//! ## Status
//!
//! **Planned** — Module placeholder. Implementation coming in 0.1.x–0.2.x.
//!
//! Specification: [RFC 9777](https://datatracker.ietf.org/doc/html/rfc9777)