Clarify AIX "#undef hz".
Clarify AIX "#undef hz".

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