[ bug ] failed to resolve: could not find 'ServerCertVerified' in 'client'

**Describe the bug** I'm trying to build https://github.com/stalwartlabs/stalwart but I ran into this error: `error[E0433]: failed to resolve: could not find 'ServerCertVerified' in 'client'` **To Reproduce** ```sh $ git clone https://github.com/stalwartlabs/stalwart stalwart $ cd stalwart $ cargo build --release ... error[E0433]: failed to resolve: could not find `ServerCertVerified` in `client` --> /home/yonas/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rust-s3-0.35.1/src/request/tokio_backend.rs:75:28 | 75 | Ok(rustls::client::ServerCertVerified::assertion()) | ^^^^^^^^^^^^^^^^^^ could not find `ServerCertVerified` in `client` | note: found an item that was configured out --> /home/yonas/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rustls-0.21.12/src/lib.rs:436:65 | 433 | #[cfg(feature = "dangerous_configuration")] | ----------------------------------- the item is gated behind the `dangerous_configuration` feature ... 436 | CertificateTransparencyPolicy, HandshakeSignatureValid, ServerCertVerified, | ^^^^^^^^^^^^^^^^^^ error[E0405]: cannot find trait `ServerCertVerifier` in module `rustls::client` --> /home/yonas/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rust-s3-0.35.1/src/request/tokio_backend.rs:65:22 | 65 | impl rustls::client::ServerCertVerifier for NoCertificateVerification { | ^^^^^^^^^^^^^^^^^^ not found in `rustls::client` | note: found an item that was configured out --> /home/yonas/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rustls-0.21.12/src/lib.rs:437:9 | 433 | #[cfg(feature = "dangerous_configuration")] | ----------------------------------- the item is gated behind the `dangerous_configuration` feature ... 437 | ServerCertVerifier, WebPkiVerifier, | ^^^^^^^^^^^^^^^^^^ error[E0412]: cannot find type `ServerCertVerified` in module `rustls::client` --> /home/yonas/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rust-s3-0.35.1/src/request/tokio_backend.rs:74:33 | 74 | ) -> Result<rustls::client::ServerCertVerified, rustls::Error> { | ^^^^^^^^^^^^^^^^^^ not found in `rustls::client` | note: found an item that was configured out --> /home/yonas/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rustls-0.21.12/src/lib.rs:436:65 | 433 | #[cfg(feature = "dangerous_configuration")] | ----------------------------------- the item is gated behind the `dangerous_configuration` feature ... 436 | CertificateTransparencyPolicy, HandshakeSignatureValid, ServerCertVerified, ``` **Environment** - Rust version: `cargo 1.93.0-nightly (445fe4a68 2025-11-07)`, `rustc 1.93.0-nightly (fb23dd3c6 2025-11-08)` - lib version: `0.35.1` **Additional context** OS: `FreeBSD 14`