* HTTP_VERSION_1_1
Use HTTP/1.1 protocol version.
* HTTP_VERSION_2_0
- Use HTTP/2 protocol version. Available if libcurl is v7.33.0 or more recent and was built with nghttp2 support.
+ Attempt to use HTTP/2 protocol version. Available if libcurl is v7.33.0 or more recent and was built with nghttp2 support.
+* HTTP_VERSION_2TLS
+ Attempt to use version 2 for HTTPS, version 1.1 for HTTP. Available if libcurl is v7.47.0 or more recent and was built with nghttp2 support.
* HTTP_VERSION_ANY
Use any HTTP protocol version.
### TLS Auth Types
-* TLS_AUTH_SRP
+* TLSAUTH_SRP
Use TLS SRP authentication. Available if libcurl is v7.21.4 or more recent and was built with gnutls or openssl with TLS-SRP support.
### DNS IP Version