Consolidate FGSP settings 7.2.1

The FGSP settings are consolidated by moving the previous config system cluster-sync settings into a subtable under config system standalone-cluster. There are no changes to the FGSP behavior.

config system cluster-sync
    edit <id>
        set peervd <VDOM>
        set peerip <address>
        set syncvd <VDOM>
        config session-sync-filter
            ...
        end
    next
end

config system standalone-cluster
    config cluster-peer
        edit <id>
            set peervd <VDOM>
            set peerip <address>
            set syncvd <VDOM>
            config session-sync-filter
                ...
            end
        next
    end
end

To configure FGSP:

config system standalone-cluster
    set standalone-group-id 1
    set group-member-id 1
    set layer2-connection available
    config cluster-peer
        edit 1
            set peerip 10.2.2.2
            config session-sync-filter
                set srcintf "port2"
                set dstintf "wan1"
                set srcaddr 10.1.100.0 255.255.255.0
                config custom-service
                    edit 3
                    next
                end
            end
        next
    end
end