/speed limits for groups

[dxnnv]

Enhancement

Add configurable limits for /speed for individual groups (and possibly players).
This could be done either through config.yml or with permissions directly.
Example:

speed-max:
  default: 1
  vip: 2
  supporter: 4

and then assigned with essentials.speed.max.vip or essentials.speed.fly.max.vip essentials.speed.walk.max,vip for more customization.

Alternatively, this could just be done with something like essentials.speed.max.5 or essentials.speed.fly.max.5 essentials.speed.walk.max.5, eliminating the need for a config entry.