Support for custom verbs

[GitSparTV]

Is your feature request related to a problem?

I'm using car for CalDAV client. CalDAV as a WebDAV variation uses different set of HTTP verbs such as:

• PROPFIND
• PROPPATCH
• MKCOL
• COPY
• MOVE
• LOCK
• UNLOCK

Not to mention we don't have all regular http verbs. See the list in Boost.

Possible Solution

Add a method to set custom verb or add all verbs.

Alternatives

The closest I can get without writing curl myself:

        session.PrepareGet(); // Writes url and other options. I'm calling it because prepareCommon is private.
        auto holder = session.GetCurlHolder();

        curl_easy_setopt(holder->handle, CURLOPT_CUSTOMREQUEST, "PROPFIND");

        const CURLcode curl_error = curl_easy_perform(holder->handle);

        return session.Complete(curl_error);

Additional Context

No response

[COM8]

Would be interesting but right now there is now plan to add this functionality. But I would be more than happy to accept a PR adding this functionality.