handle invalid values at servers #32

A server must not rely on values sent from clients to be within the bounds a parameter specifies. It needs to pre-evaluate a value-update and either:

• reject the update
  • A rejected value must not be sent to other clients and the current value needs to be sent back to the client.
• confine the value within its bounds (clip, scale, do-nothing, ...)
  • A corrected value is to be sent back to the sending client.

This shall not be part of the protocol specification but server implementers need to consider this.