//! The RFC 1928 core's utility modules (upstream `src/util/` —
//! extraction; see the fork statement in the crate root's `mod.rs`
//! and ADR-013 for ownership).
//!
//! Upstream layout: `stream.rs` (the `read_exact!`/`ready!` macros +
//! `ConnectError`) and `target_addr.rs` (`TargetAddr` + the address
//! codec) — filled by the wire-vocabulary extraction task.