Oauth2 Updates (#6226)

* break out go and js build commands

* support oauth providers that return errors via redirect

* remove extra call to get grafana.net org membership

* removed GitHub specifics from generic OAuth

* readded ability to name generic source

* revert to a backward-compatible state, refactor and clean up

* streamline oauth user creation, make generic oauth support more generic

pkg/setting/setting_oauth.go

@@ -9,6 +9,9 @@ type OAuthInfo struct {
 	ApiUrl                 string
 	AllowSignup            bool
 	Name                   string
+	TlsClientCert          string
+	TlsClientKey           string
+	TlsClientCa            string
 }
 
 type OAuther struct {