force the sprinting animation if speed is bigger than X blocks per second

[thealex-br]

Is your feature request related to a problem? Please describe.
not exactly a problem, but its weird when the player is fast and he is not using the sprinting animation, this happen with some mods and modified servers

Describe the solution you'd like
the idea is to force the player to use the run animation (if available) if that entity is at a speed of X blocks per second, maybe the same for non player entities

Describe alternatives you've considered
if possible, modify incoming packets to force player to run, I think this is the best solution because it would not be necessary to make such big changes for a subtle change
(i used google translator, sorry for spelling errors)