Copy the server list instead of mutating in-place
Copy the server list instead of mutating in-place

helight/helight_code,cch123/go-zookeeper,aybabtme/go-zookeeper,helight/helight_code,helight/helight_code,ChannelMeter/go-zookeeper,helight/helight_code,theckman/go-zookeeper,rajivreddy/go-zookeeper,helight/helight_code,helight/helight_code,kmiku7/go-zookeeper-annotated,lightpaw/go-zookeeper,helight/helight_code,mikeqian/go-zookeeper,wickman/go-zookeeper,dallasmarlow/go-zookeeper,helight/helight_code,helight/helight_code