words: whitelist more from new balancer branch

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

.words

@@ -67,3 +67,28 @@ WAL
 consistentIndex
 todo
 saveWALAndSnap
+
+subconns
+nop
+SubConns
+DNS
+passthrough
+ccBalancerWrapper
+rebalanced
+addrConns
+subConn
+TestBalancerDoNotBlockOnClose
+middleware
+clusterName
+jitter
+FIXME
+retriable
+github
+retriable
+jitter
+WithBackoff
+BackoffLinearWithJitter
+jitter
+WithMax
+ServerStreams
+BidiStreams