title: how to verify root CA bundle via openssl commands?
body: <p>i added a self-signed certificate to root CA bundle,so i need to validate the whole file "ca-bundle.crt".
  is there any openssl command to do this?
  if there is, i can use code system("openssl xxxx") to do this.
  i had tried the command "openssl verify ..path/ca-bundle.crt", it can't validate self-signed certificate.</p>