A "serverinfo" extension is returned in response to an empty ClientHello
Extension.
-SSL_CTX_use_serverinfo_file() loads one or more serverinfo extensions from
+SSL_CTX_use_serverinfo() loads one or more serverinfo extensions from
a byte array into B<ctx>. The extensions must be concatenated into a
sequence of bytes. Each extension must consist of a 2-byte Extension Type,
a 2-byte length, and then length bytes of extension_data.