type t = {follow_redirects : bool;whether to follow redirects
*)max_redirects : int;max redirects to follow. Could probably be rolled up into one option
*)allow_insecure : bool;Wether to allow insecure server connections when using SSL
*)max_http_version : Versions.HTTP.t;Use this as the highest HTTP version when sending requests
*)h2c_upgrade : bool;Send an upgrade to `h2c` (HTTP/2 over TCP) request to the server. `http2_prior_knowledge` below ignores this option.
*)http2_prior_knowledge : bool;Assume HTTP/2 prior knowledge -- don't use HTTP/1.1 Upgrade when communicating with "http" URIs, default to HTTP/2.0 when we can't agree to an ALPN protocol and communicating with "https" URIs.
*)cacert : string option;The path to a CA certificates file in PEM format
*)capath : string option;The path to a directory which contains CA certificates in PEM format
*)min_tls_version : Versions.TLS.t;max_tls_version : Versions.TLS.t;tcp_nodelay : bool;connect_timeout : float;buffer_size : int;Buffer size used for requests and responses. Defaults to 16384 bytes
*)body_buffer_size : int;Buffer size used for request and response bodies.
*)enable_http2_server_push : bool;default_headers : (Headers.name * Headers.value) list;Set default headers (on the client) to be sent on every request.
*)}val default : t