Mesalink has ceased development. We can no longer encourage use of it.
It seems to be continued under the name TabbySSL, but no attempts have
(yet) been to make curl support it.
Fixes#8188Closes#8191
The latest cmake-rs assumes cmake's --parallel works. That was added in
cmake 3.12, but a lot of our CI builds run on Ubuntu Bionic which only
has cmake 3.10.
Fixes#7927Closes#7952
Follow-up to 6d972c8b1c which missed updating this directory name.
Also no longer call it crustls in the docs and bump to rusttls-ffi 0.7.1
Closes#7311