backups: fix mounting logic of backup settings and cloudron restore

src/backups.js

@@ -31,6 +31,7 @@ exports = module.exports = {
     configureCollectd,
 
     generateEncryptionKeysSync,
+    isMountProvider,
 
     BACKUP_IDENTIFIER_BOX: 'box',
 
@@ -116,6 +117,10 @@ function api(provider) {
     }
 }
 
+function isMountProvider(provider) {
+    return provider === 'sshfs' || provider === 'cifs' || provider === 'nfs' || provider === 'ext4';
+}
+
 function injectPrivateFields(newConfig, currentConfig) {
     if ('password' in newConfig) {
         if (newConfig.password === constants.SECRET_PLACEHOLDER) {