SNS version 5.1.3 EA bug fixes

System

Filter - NAT

Support reference TAC-1565

In some cases, competing access to the cache would prevent a filter rule from being correctly applied. This issue has been fixed.

IPsec VPN - Global policy with virtual IPsec interfaces (VTI)

When a configuration that contains a global IPsec policy with rules that use VTIs (e.g., following a deployment through Stormshield Management Center) is updated to SNS version 5.1, these rules are no longer wrongly duplicated.