Port of 21.11 4.5.0 to 21.1

4.5.0-21.11 Huge Changes Added rocket boost Added pivoting Added offset Added instaglide Added server specific optimizations. You'll need to enable it on a server for it to work. Usages:

/h-ely rocket|glide off|delayed|on

THIS WILL FLAG ON SERVERS IF ON, ESPECIALLY THE ROCKET BOOST

if you put the value as ON, it will play as if you have 0 ping on the server [rocket boost will apply 1 tick later since that is vanilla gameplay]

if you put the value as DELAYED, it will apply the optimization after a delay of your ping

Fixed the elytra sound duplication

Fixed the elytra sound duplication