luaRedisGenericCommand() cached argv handling simplified.
luaRedisGenericCommand() cached argv handling simplified.

As discussed in issue #1945.

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