
The create header revision is the current etcd revision. For watches with rev=0, the next revision is hdr.rev+1. For watches with rev=n, the next revision should be n. Fixes TestDoubleBarrier timeouts.
The create header revision is the current etcd revision. For watches with rev=0, the next revision is hdr.rev+1. For watches with rev=n, the next revision should be n. Fixes TestDoubleBarrier timeouts.