Merge branch 'introducing-openvpn-data-channel-offload'

Antonio Quartulli says:

====================
Introducing OpenVPN Data Channel Offload

Notable changes since v25:
* removed netdev notifier (was only used for our own devices)
* added .dellink implementation to address what was previously
  done in notifier
* removed .ndo_open and moved netif_carrier_off() call to .ndo_init
* fixed author in MODULE_AUTHOR()
* properly indented checks in ovpn.yaml
* switched from TSTATS to DSTATS
* removed obsolete comment in ovpn_socket_new()
* removed unrelated hunk in ovpn_socket_new()

The latest code can also be found at:

https://github.com/OpenVPN/ovpn-net-next

Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
====================

Link: https://patch.msgid.link/20250415-b4-ovpn-v26-0-577f6097b964@openvpn.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>