Enable plugins to override the url_options in authorize method

Patch here :-)

The 2.x version suffers the same and patch in #2 applies cleanly. This is a simple and obvious fix that can be applied in 2.x and cherry-picked into 3.x.

Tested patch in #2 on 3.0.0 alpha2 version and it applied cleanly

Duplicate of #3317308: OpenIdConnectClientBase::authorize() no longer use ::getRedirectUrl() to create redirect_uri →

And yes, I know I haven't created a new release in quite some time, but it would really be useful if patches are made against the latest dev codebase and not against the latest release.