Only set options if they are defined
Only set options if they are defined

Depending on how the Ruby bindings to SSL were created, some of these constants
might not be defined.

jurriaan/vault-ruby,NicheProject/vault-ruby,parabuzzle/vault-ruby,martinbaillie/vault-ruby,hashicorp/vault-ruby,skippy/vault-ruby,hetznerZA/vault-ruby