Use rand.Int*n() where appropriate

nomad/eval_broker.go

@@ -348,7 +348,7 @@ func (b *EvalBroker) scanForSchedulers(schedulers []string) (*structs.Evaluation
 	default:
 		// Multiple tasks. We pick a random task so that we fairly
 		// distribute work.
-		offset := rand.Int63() % int64(n)
+		offset := rand.Int63n(n)
 		return b.dequeueForSched(eligibleSched[offset])
 	}
 }

nomad/rpc.go

@@ -232,7 +232,7 @@ func (s *Server) forwardRegion(region, method string, args interface{}, reply in
 	}
 
 	// Select a random addr
-	offset := rand.Int31() % int32(len(servers))
+	offset := rand.Int31n(len(servers))
 	server := servers[offset]
 	s.peerLock.RUnlock()