OIDC: allow to debug the received id_token

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

config/config.go

@@ -122,6 +122,7 @@ var (
 			ImplicitRoles:   false,
 			Scopes:          []string{"openid", "profile", "email"},
 			CustomFields:    []string{},
+			Debug:           false,
 		},
 		Security: httpd.SecurityConf{
 			Enabled:                 false,
@@ -1437,6 +1438,12 @@ func getHTTPDOIDCFromEnv(idx int) (httpd.OIDC, bool) {
 		isSet = true
 	}
 
+	debug, ok := lookupBoolFromEnv(fmt.Sprintf("SFTPGO_HTTPD__BINDINGS__%v__OIDC__DEBUG", idx))
+	if ok {
+		result.Debug = debug
+		isSet = true
+	}
+
 	return result, isSet
 }