sproxy v1.96.0 Release Notes
Added support for Yandex (https://tech.yandex.com/oauth/).
Encode full URL (including protocol) into the state parameter, not just path. This makes it possible to work with OAuth2 providers that do not support multiple callback URL, like Yandex.
Fixed POST requests for tokens with Google and LinkedIn. They were mistakenly using URL paramaters instead of URL-encoded bodies.