CURLOPT_HTTP_VERSION.3: connection re-use goes before version

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTP_VERSION, long version);

.SH DESCRIPTION

Pass \fIversion\fP a long, set to one of the values described below. They

force libcurl to use the specific HTTP versions. This is not sensible to do

unless you have a good reason. You have to set this option if you want to use

Pass \fIversion\fP a long, set to one of the values described below. They ask

libcurl to use the specific HTTP versions. This is not sensible to do unless

you have a good reason. You have to set this option if you want to use

libcurl's HTTP/2 support.

Note that the HTTP version is just a request. libcurl will still prioritize to

re-use an existing connection so it might then re-use a connection using a

HTTP version you haven't asked for.

.IP CURL_HTTP_VERSION_NONE

We don't care about what version the library uses. libcurl will use whatever

it thinks fit.