(experimental)
mod_mbedtls supports most ssl.* config options supported by mod_openssl
thx Ward Willats for the initial discussion and attempt in the comments
https://redmine.lighttpd.net/boards/3/topics/7029
./configure --with-nettle to use Nettle crypto lib for algorithms,
instead of OpenSSL or wolfSSL. Note: Nettle does not provide TLS.
x-ref:
"How to use SHA-256 without OpenSSL?"
https://redmine.lighttpd.net/boards/2/topics/8903