swanctl: Document new HW offload options/behavior

diff --git a/src/swanctl/swanctl.opt b/src/swanctl/swanctl.opt
index 5675b31cab8e9abf8f8ec54bf1cc296bb4ed58c9..120e5812e35dc204a3b26cb633dc35042914727b 100644 (file)
--- a/src/swanctl/swanctl.opt
+++ b/src/swanctl/swanctl.opt
@@ -931,6 +931,12 @@ connections.<conn>.children.<child>.hw_offload = no
        Enable hardware offload for this CHILD_SA, if supported by the IPsec
        implementation.
 
+       Enable hardware offload for this CHILD_SA, if supported by the IPsec
+       implementation. The value _yes_ enforces offloading and the installation
+       will fail if it's not supported by either kernel or device.     The value _auto_
+       enables offloading, if it's supported, but the installation does not fail
+       otherwise.
+
 connections.<conn>.children.<child>.start_action = none
        Action to perform after loading the configuration (_none_, _trap_, _start_).