go 负载均衡器,支持一下几种算法：
- 基于随机算法的负载均衡
- 基于RoundRobin算法的负载均衡
- 基于带权重RoundRobin算法的负载均衡
- 基于一致性hash算法的负载均衡
- 基于洗牌算法的负载均衡
- 基于优化洗牌算法的负载均衡
算法运行结果：
name: hash cost time: 3818
192.168.145.0:8080;call times: 2035
192.168.149.1:8080;call times: 2028
192.168.221.2:8080;call times: 1946
192.168.32.3:8080;call times: 2002
192.168.92.4:8080;call times: 1989
name: random cost time: 542
192.168.145.0:8080;call times: 2031
192.168.149.1:8080;call times: 2031
192.168.221.2:8080;call times: 1975
192.168.32.3:8080;call times: 1999
192.168.92.4:8080;call times: 1964
name: roundrobin cost time: 231
192.168.145.0:8080;call times: 2000
192.168.149.1:8080;call times: 2000
192.168.221.2:8080;call times: 2000
192.168.32.3:8080;call times: 2000
192.168.92.4:8080;call times: 2000
name: weight_roundrobin cost time: 4014
192.168.145.0:8080;call times: 1538 ;weight: 4
192.168.149.1:8080;call times: 1923 ;weight: 5
192.168.221.2:8080;call times: 1538 ;weight: 4
192.168.32.3:8080;call times: 1923 ;weight: 5
192.168.92.4:8080;call times: 3078 ;weight: 8
name: shuffle cost time: 149219
192.168.32.3:8080;call times: 2021
192.168.145.0:8080;call times: 2025
192.168.92.4:8080;call times: 2071
192.168.149.1:8080;call times: 1950
192.168.221.2:8080;call times: 1933
name: shuffle2 cost time: 145782
192.168.221.2:8080;call times: 2007
192.168.149.1:8080;call times: 2029
192.168.145.0:8080;call times: 1998
192.168.92.4:8080;call times: 1926
192.168.32.3:8080;call times: 2040
