Cluster: getKeysFromCommand() top comment improved.
Cluster: getKeysFromCommand() top comment improved.

MSOpenTech/redis,maodeyi/redis_lua,slfs007/mk-redis,Hailei/redis,xuzhezhaozhao/redis_reading,darksideofthemoo/redis-histogram,darksideofthemoo/redis-histogram,MSOpenTech/redis,splitice/redis,ramonsnir/redis,splitice/redis,ksarch-saas/redis,himoca/redis,ksarch-saas/redis,MSOpenTech/redis,HunanTV/redis,HunanTV/redis,Hailei/redis,louisliangjun/redis,louisliangjun/redis,maodeyi/redis_lua,ttuna/msot-redis,jxwr/redis,slfs007/mk-redis,ksarch-saas/redis,ksarch-saas/redis,ttuna/msot-redis,spearhead-ea/redis,jxwr/redis,HunanTV/redis,louisliangjun/redis,xuzhezhaozhao/redis_reading,xuzhezhaozhao/redis_reading,Hailei/redis,louisliangjun/redis,darksideofthemoo/redis-histogram,spearhead-ea/redis,xuzhezhaozhao/redis_reading,slfs007/mk-redis,splitice/redis,himoca/redis,ttuna/msot-redis,ttuna/msot-redis,Hailei/redis,MSOpenTech/redis,himoca/redis,ramonsnir/redis,ramonsnir/redis,splitice/redis,darksideofthemoo/redis-histogram,MSOpenTech/redis,HunanTV/redis,maodeyi/redis_lua,spearhead-ea/redis,ttuna/msot-redis,jxwr/redis