The Curl_easy pointer struct entry in connectdata is now gone. Just before commit 215db086e0 landed on January 8, 2021 there were 919 references to conn->data. Closes #6608
215db086e0
This adds a new TLS backend, rustls. It uses the C-to-rustls bindings from https://github.com/abetterinternet/crustls. Rustls is at https://github.com/ctz/rustls/. There is still a fair bit to be done, like sending CloseNotify on connection shutdown, respecting CAPATH, and properly indicating features like "supports TLS 1.3 ciphersuites." But it works well enough to make requests and receive responses. Blog post for context: https://www.abetterinternet.org/post/memory-safe-curl/ Closes #6350
