Fix docs.rs build

Author: kornelski

.github/workflows/ci.yml

@@ -63,6 +63,8 @@ jobs:
       - name: Check docs
         run: cargo doc --no-deps -p boring -p boring-sys --features rpk,pq-experimental,underscore-wildcards
         env:
+          CARGO_BUILD_RUSTDOCFLAGS: "--cfg=docsrs"
+          RUST_BOOTSTRAP: 1
           DOCS_RS: 1
       - name: Cargo.toml boring versions consistency
         shell: bash

boring-sys/src/lib.rs

@@ -10,7 +10,6 @@
     non_upper_case_globals,
     unused_imports
 )]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 use std::convert::TryInto;
 use std::ffi::c_void;

boring/src/lib.rs

@@ -96,8 +96,6 @@
 //! Presently all these key agreements are deployed by Cloudflare, but we do not guarantee continued
 //! support for them.
 
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
-
 #[macro_use]
 extern crate bitflags;
 #[macro_use]

hyper-boring/src/lib.rs

@@ -1,6 +1,5 @@
 //! Hyper SSL support via BoringSSL.
 #![warn(missing_docs)]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 use crate::cache::SessionKey;
 use boring::error::ErrorStack;

tokio-boring/src/lib.rs

@@ -11,7 +11,6 @@
 //! [`boring`] crate, on which this crate is built. Configuration of TLS parameters is still
 //! primarily done through the [`boring`] crate.
 #![warn(missing_docs)]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 use boring::ssl::{
     self, ConnectConfiguration, ErrorCode, MidHandshakeSslStream, ShutdownResult, SslAcceptor,