Http-lwt-client -- simple HTTP client using http/af, h2, and lwt

A simple HTTP/1.1 and HTTP/2.0 client supporting HTTP and HTTPS. It follows
redirects (up to a given limit). Its dependency cone is small, and does not
include any wrappers or frameworks.

Additionally, a sample binary hurl is provided that exposes most of the
functionality as a command line program.

Other HTTP clients developed in OCaml include
ofetch (minimal OCaml stdlib-only),
piaf (HTTP 1 and HTTP 2 support),
cohttp (a functorised HTTP client and
server library), curly (a wrapper around
curl), paf-le-chien (a MirageOS
layer for HTTP/AF and H2) - but they didn't fit our needs.

This is distributed under the 3 clause BSD license, some code is inherited from
the HTTP/AF project
(src/http_lwt_unix.{ml,mli} - as noted in that file).