Do feature changes invalidate license agreements?

If I want a feature that requires a change and I make the change to the source will the server support contract be invalidated?

Or. A feature we need is a method for synchronization w/o locking. The protocol will require using the send time to the memcached server be rejected if the value is before the next tick of the sync clock. Let's say the sync units are 10 minute intervals.

The approach requires the following.

1. set the modulo value to use for the sync cycle duration [ 10 ] in seconds [ use the cas field ? ]
2. reject set operations if the start time of the packet on the wire is before the last tick [ 10 minute cycle ].
3. get current server 64 bit timestamp. [ use the cas bytes in the protocol? ].