Ignore /target
Remove Offload()'s start parameter

We don't need this, as we dynamically calculate the starting nodes based
on the offload capability. It is then redundant to ask the user to
provide the starting node.
Make Offload() take varargs

Since we now only have a list as input, we can change it to a varargs
array, which lets us specify the nodes directly instead of having to go
through Arrays.asList().