what's the difference between "shindig.signing.global-callback-uri" and "gadgets.uri.oauth.callbackTemplate"?

[Li Xu]

We're moving "shindig.signing.global-callback-uri" into container.js as
part of context root patch. We found there's already a similar property in
container.js called "gadgets.uri.oauth.callbackTemplate". The value of
these two property is the same. Is there any reason we can't use
gadgets.uri.oauth.callbackTemplate to replace
"shindig.signing.global-callback-uri"?
Here's the current usage about these two properties:
1. DefaultOauthUriManager -- use gadgets.uri.oauth.callbackTemplate
public Uri makeOAuthCallbackUri(String container, String host) {
    String callback = config.getString(container,
OAUTH_GADGET_CALLBACK_URI_PARAM);
    if (callback == null) {
      return null;
    }
    return Uri.parse(callback.replace("%host%", host));
  }

2. OAuthModule - use "shindig.signing.global-callback-uri"
 public OAuthStoreProvider(
        @Named(OAUTH_SIGNING_KEY_FILE) String signingKeyFile,
        @Named(OAUTH_SIGNING_KEY_NAME) String signingKeyName,
        ContainerConfig config) {
      store = new BasicOAuthStore();
      loadDefaultKey(signingKeyFile, signingKeyName);
      store.setDefaultCallbackUrl(config.getString(ContainerConfig.
DEFAULT_CONTAINER, "shindig.signing.global-callback-url"));
      loadConsumers();
      this.config = config;
    }

Thanks,
li