Merge branch 'hw-packet-offload'

This adds support for the new "packet" hardware offload feature that's
added to the Linux kernel with 6.2.  In this mode, the device handles
the complete framing of the ESP packet as well as the policy checks,
in addition to the crypto.

For the IKE sockets, port-based bypass policies are automatically
offloaded to devices that support it.

Closes strongswan/strongswan#1462