v0.6.3

• Add libxdp support via dlopen(3)
• Add --max-window flag for disabling variable window mechanism (mainly for debugging purposes)
• Add --xdp-mode={skb,native} option for forcing XDP attach mode
  • Some VMs may encounter errors when loading Mimic, similar to that of #11. Use --xdp-mode=skb to work around them.
  • Some Intel NICs have XDP native mode for offloading XDP programs in drivers (e1000e, igb, igc, etc.), but may sometimes experience sudden connection breaks that last for minutes. --xdp-mode=skb may help by disabling offload.
• Allow IP free bind to enable scenarios like #7.
• Various bug fixes