12. New protocols
13. SSL
+ 13.1 TLS-PSK with OpenSSL
13.2 Provide mutex locking API
13.3 Support in-memory certs/ca certs/keys
13.4 Cache/share OpenSSL contexts
13. SSL
+13.1 TLS-PSK with OpenSSL
+
+ Transport Layer Security pre-shared key ciphersuites (TLS-PSK) is a set of
+ cryptographic protocols that provide secure communication based on pre-shared
+ keys (PSKs). These pre-shared keys are symmetric keys shared in advance among
+ the communicating parties.
+
+ https://github.com/curl/curl/issues/5081
+
13.2 Provide mutex locking API
Provide a libcurl API for setting mutex callbacks in the underlying SSL