//! DNSSEC signing and validation
//!
//! Types and functions that are common between signing and validation.
//! Experimental support for DNSSEC signing.
//! Experimental support for DNSSEC validation.
//!
//! Note that in addition to the feature flags that enable the various modules
//! (`unstable-sig`, `unstable-validator`), at least one cryptographic
//! backend needs to be selected (currently there are `ring` and `openssl`).