Provides support for the TLS Token Binding extension.
Provides support for token binding according to the following RFCs:
This token binding library links to OpenSSL/BoringSSL to provide token binding negotiation over TLS, and provides high level functions needed to add token binding support to HTTP applications.
This is compatible with OpenSSL versions 1.1.1 and newer. It is implemented using the custom extension API in OpenSSL 1.1.1, see: https://github.com/openssl/openssl/pull/3139