stromgswan: read values of devices differently
There can be different devices and reading strongswan1 when we need something like nm-xfrm-1864782 is just wrong. All values are visible via nmcli command so we just need to filter them properly.
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There can be different devices and reading strongswan1 when we need something like nm-xfrm-1864782 is just wrong. All values are visible via nmcli command so we just need to filter them properly.