Dear All, I know that 5510 can support A/A,A/S mode with Security Plus license''ASA5510-SEC-BUN-K9'How about if the 5510 has Anti-X feature 'ASA5510-CSC10-K9', can it support HA also? Or I need to buy extra license '(ASA5510-SEC-PL) ASA 5510 Security...