copr: disable offloading in the nmconnection keyfile
    
    The old network script is deprecated, please see
    /etc/sysconfig/network-scripts/readme-ifcfg-rh.txt
    
    You can check that the settings are correct with
    
        ethtool -k eth0 | egrep 'tcp-segmentation-offload:
                                 |generic-receive-offload:
                                 |generic-segmentation-offload: '