MC-4839: Client-server desync when player attacks while holding sprint key

[leumasme]

• Sprint by holding forwards and holding CTRL
• Punch a mob
  • This will briefly interrupt your sprint, but you'll automatically start sprinting again
• You're now sprinting clientside but not serverside
  • No hunger lost by "sprinting" this way as it counts as walking; other (modded) things that detect sprinting serverside will thus also not activate in this state (like "Piston Boots" from "Adventure Backpack" giving speed effect while sprinting)

MC-69459

I believe this is a good candidate for getting fixed by this mod as it's a somewhat noticable bug that's present in vanilla, but I'm not sure how easy it would be to fix.