Does not build on Debian Buster

[Person-93]

It fails with the following output:

   Updating crates.io index
   Compiling openssl v0.9.24
error: failed to run custom build command for `openssl v0.9.24`
process didn't exit successfully: `/home/mtepfer/src/kay/target/debug/build/openssl-38e9a39fe210587c/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'Unable to detect OpenSSL version', /home/mtepfer/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-0.9.24/build.rs:16:14
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

I tried changing the required version of tunsgtenite in the dependencies to 0.6.1, which uses a newer version of the openssl package, and it compiled.