OAuthAuthentication extension should be converted to use manifest version 2 in its extension.json file.

In extension manifest version 1, documentation was made like this:

	"config": {
		"@doc": "see OAuthAuthentication.php",
		"OAuthAuthenticationUrl": null,
         }

This documentation can now be done with "description" and "value" fields available in manifest_version: 2 like this:

	"config": {
            "OAuthAuthenticationUrl": {
		"description": "see OAuthAuthentication.php",
		"value": null,
            }
	},

The maintenance script maintenance/updateExtensionJsonSchema.php semi-automates this conversion and is recommended to be used