Today, I saw my AppVeyor builds fail with this message
rustup-init.exe -y --default-toolchain stable info: syncing channel updates for 'stable-x86_64-pc-windows-msvc' error: could not download file from 'https://static.rust-lang.org/dist/channel-rust-stable.toml.sha256' to 'C:\Users\appveyor\.rustup\tmp\tulghiwelxl6c099_file' info: caused by: error during download info: caused by:  SSL connect error (schannel: next InitializeSecurityContext failed: Unknown error (0x80092013) - The revocation function was unable to check revocation because the revocation server was offline.)
The command was simply supposed to install the stable Rust compiler.
Has anybody else seen this? I believe something changed outside my project — perhaps in AppVeyor, perhaps elsewhere.