-+ Preliminiary HTTP2 support for http\Client (libcurl with nghttp2 support)
-+ Improved performance of HTTP info parser (request/response line)
-+ Improved performance of updating client observers
-+ Improved performance of http\Env\Response output to streams
-+ Added http\Client::configure() method accepting an array with the following options for libcurl:
- . maxconnects (int, size of the connection cache)
- . max_host_connections (int, max number of connections to a single host, libcurl >= 7.30.0)
- . max_pipeline_length (int, max number of requests in a pipeline, libcurl >= 7.30.0)
- . max_total_connections (int, max number of simultaneous open connections of this client, libcurl >= 7.30.0)
- . pipelining (bool, whether to enable HTTP/1.1 pipelining)
- . chunk_length_penalty_size (int, chunk length threshold for pipelining, libcurl >= 7.30.0)
- . content_length_penalty_size (int, size threshold for pipelining, libcurl >= 7.30.0)
- . pipelining_server_bl (array, list of server software names to blacklist for pipelining, libcurl >= 7.30.0)
- . pipelining_site_bl (array, list of server host names to blacklist for pipelining, libcurl >= 7.30.0)
- . use_eventloop (bool, whether to use libevent, libcurl+libevent)
-+ Added http\Client::getAvailableOptions() and http\Client::getAvailableConfiguration() methods
-+ Added support for HTTP2 if libcurl was built with nghttp2 support.
-+ Added http\Client\Curl\HTTP_VERSION_2_0 constant (libcurl >= 7.33.0)
-+ Added http\Client\Curl\TLS_AUTH_SRP constant (libcurl >= 7.21.4)
-+ Added pinned_publickey SSL request option (libcurl >= 7.39.0)
-+ Added tlsauthtype, tlsauthuser and tlsauthpass SSL request option (libcurl >= 7.21.4)
-+ Added verifystatus (a.k.a OCSP) SSL request option (libcurl >= 7.41.0)
-+ Added proxyheader request option (libcurl >= 7.37.0)
-+ Added unix_socket_path request option (libcurl >= 7.40.0)
-* Fixed compress request option
-* Fixed parsing authorities of CONNECT messages
-* Fixed parsing Content-Range messages
-* Fixed http\Env\Response to default to chunked encoding over streams
-* Fixed superfluous output of Content-Length:0 headers
-* Fixed persistent easy handles to be only created for persistent multi handles
-- Deprecated http\Client::enablePipelining(), use http\Client::configure(["pipelining" => true]) instead
-- Deprecated http\Client::enableEvents(), use http\Client::configure(["use_eventloop" => true]) instead
-- Removed the cookies entry from the transfer info, wich was very slow and generated a Netscape formatted list of cookies