13.9 TLS record padding
13.10 Support Authority Information Access certificate extension (AIA)
13.11 Support intermediate & root pinning for PINNEDPUBLICKEY
+ 13.12 Reduce CA certificate bundle reparsing
13.13 Make sure we forbid TLS 1.3 post-handshake authentication
13.14 Support the clienthello extension
Adding this feature would make curls pinning 100% compatible to HPKP and
allow more flexible pinning.
+13.12 Reduce CA certificate bundle reparsing
+
+ When using the OpenSSL backend, curl will load and reparse the CA bundle at
+ the creation of the "SSL context" when it sets up a connection to do a TLS
+ handshake. A more effective way would be to somehow cache the CA bundle to
+ avoid it having to be repeatedly reloaded and reparsed.
+
+ See https://github.com/curl/curl/issues/9379
+
13.13 Make sure we forbid TLS 1.3 post-handshake authentication
RFC 8740 explains how using HTTP/2 must forbid the use of TLS 1.3