branding: add template variables

we can now have %YEAR% and %VERSION% in the footer

src/cloudron.js

@@ -29,6 +29,7 @@ var addons = require('./addons.js'),
     auditSource = require('./auditsource.js'),
     backups = require('./backups.js'),
     BoxError = require('./boxerror.js'),
+    branding = require('./branding.js'),
     constants = require('./constants.js'),
     cron = require('./cron.js'),
     debug = require('debug')('box:cloudron'),
@@ -175,7 +176,7 @@ function getConfig(callback) {
             version: constants.VERSION,
             isDemo: settings.isDemo(),
             cloudronName: allSettings[settings.CLOUDRON_NAME_KEY],
-            footer: allSettings[settings.FOOTER_KEY] || constants.FOOTER,
+            footer: branding.renderFooter(allSettings[settings.FOOTER_KEY] || constants.FOOTER),
             features: appstore.getFeatures(),
             profileLocked: allSettings[settings.DIRECTORY_CONFIG_KEY].lockUserProfiles,
             mandatory2FA: allSettings[settings.DIRECTORY_CONFIG_KEY].mandatory2FA