Services offloading of DS-Lite packet processing

This feature offloads DS-Lite packet processing to the Network Processing Unit (NPU), optimizing performance and reducing CPU load on the Services Processing Unit (SPU). 

Enable services offload for a DS-Lite softwire concentrator (SC) using the set security softwires softwire-name service-offload command. Disable it with the set security softwires softwire-name service-offload off command. New sessions will not be offloaded, but existing ones remain unchanged.