Allow AUTH when Redis is busy because of timedout Lua script.
Allow AUTH when Redis is busy because of timedout Lua script.

If the server is password protected we need to accept AUTH when there is
a server busy (-BUSY) condition, otherwise it will be impossible to send
SHUTDOWN NOSAVE or SCRIPT KILL.

This fixes issue #708.

ttuna/msot-redis,davidradunz/redis,tjschuck/redis,francischan714/redis,zguangyu/redis,splitice/redis,wbailey5/redis,gaoxianglong/redis,haima-zju/redis-3.0-annotated,gilala/hredis,seppo0010/rlite-server,tellapart/redis,splitice/redis,AplayER/redis,MSOpenTech/redis,taoguan/redis,oranagra/redis,j0hnma/hszredis,ketor/redis,francischan714/redis,xuzhezhaozhao/redis_reading,july2993/redis,yossigo/redis,janekmi/redis,splitice/redis,seppo0010/rlite-server,NBSW/redis,charsyam/redis,pcarrier/redis,citusdata/redis,xujunhai1991/redis,hawkchch/redis,gspandy/annotated_redis_source,Hailei/redis,PKRoma/redis,JoeWoo/redis,qiyang0221/redis,AALEKH/redis,ofirluzon/redis,GitHubMota/redis,ChanningDuan/annotated_redis_source,kensou97/redis,ncopa/redis,harrisonfeng/redis,CodeJuan/redis,ErikDubbelboer/redis,xuguruogu/redis,ketor/redis,ttuna/msot-redis,zhoudayang/redis,xujunhai1991/redis,gilala/redis,MasahikoSawada/redis,rouzier/redis,francischan714/redis,zhiliaoniu/redis,gilala/hredis,YongMan/redis,pcarrier/redis,wbailey5/redis,josiahcarlson/redis,cloudrain21/redis,hawkchch/redis,Aaron1992/redis,magastzheng/redis-3.0-annotated,huyuezheng/redis,seandsky/redis,MSOpenTech/redis,mverrilli/redis,takeshineshiro/redis,jackyan/redis,takeshineshiro/redis,citusdata/redis,190235047/redis,mingyaaaa/redis,gilala/hbjredis,ChaosCoo/annotated_redis_source,antirez/redis,zhaobo1023/redis-3.0-annotated,darksideofthemoo/redis-histogram,ttuna/msot-redis,brg-liuwei/redis,Hailei/redis,mpalmer/redis,HouKangkang/redis-3.0-annotated,vincent-vivian-liu/redis,jbochi/redis,fankeke/redis-3.0-annotated,whille/redis-3.0-annotated,healerkx/redis,riyan8250/redis,flashbuckets/redis,programmecat/redis,tanghaodong25/redis,Markgorden/redis,spearhead-ea/redis,Soledad89/redis,jingjidejuren/redis,zhcy/redis,hhli/redis,fengshao0907/redis,h0x91b/redis,valdsJohn/redis,cnbin/redis,itugs/redis,csuhawk/redis,nnog/redis,yuhc/redis-benchmark-enhanced,190235047/redis,viongpanzi/annotated_redis_source,yybirdcf/learn-redis,NBSW/redis,ChanningDuan/annotated_redis_source,programmecat/redis,mengzhejin/RedisStudy,machicao2013/redis-source-annotated,LongXQ/redis,ouyangkongtong/redis,LongXQ/redis,josiahcarlson/redis,huyuezheng/redis,ton31337/redis,PKRoma/redis,jxwr/redis,Soledad89/redis,itamarhaber/redis,jbochi/parallel_redis,oranagra/redis,PKRoma/redis,ErikDubbelboer/redis,fengshao0907/redis-3.0-annotated,wenxueliu/redis_comment,weizijun/redis,yossigo/redis,MSOpenTech/redis,timothyohare/3rdPartySrc-redis,universsky/redis,drinkthere/redis-3.0-annotated,mumingv/redis,jasonkying/redis,brg-liuwei/redis,ofirluzon/redis,tidatida/annotated_redis_source,qiyang0221/redis,tanghaodong25/redis,colstrom/redis,ketor/redis,AplayER/redis,unasm/redis-3.0-annotated,xuzhezhaozhao/redis_reading,gaoxianglong/redis,pcarrier/redis,badboy/redis,GrimDerp/redis,badboy/redis,mgk/redis,takeshineshiro/redis,ton31337/redis,neomantra/redis,MOON-CLJ/redis,adamweixuan/redis-3.0-annotated,honestme/redis,4396/redis,CodeJuan/redis,mengyou0304/redis,MOON-CLJ/redis,StevenTsai/redis,aluzzardi/redis,zhcy/redis,shining-yang/redis,dreamquster/redis,harrisonfeng/redis,moonbingbing/redis-3.0-annotated,atreeyang/redis,huangz1990/redis-3.0-annotated,ncopa/redis,arijitvt/redis,nilyang/redis-tdd-annotation,ituncle/redis,kensou97/redis,ctripcorp/redis,shshlzh/redis-3.0-annotated,kensou97/redis,citusdata/redis,darksideofthemoo/redis-histogram,miaoyc1989/redis-3.0-annotated,mengyou0304/redis,narma/redis,LongXQ/redis,seppo0010/redis,ytjiang/redis,vincent-vivian-liu/redis,OmarQunsul/graph-redis,ouyangkongtong/redis,mcanthony/redis,rrsean/redis-3.0-annotated,SyntaxStacks/redis,itamarhaber/redis,qiyang0221/redis,kmiku7/redis,machicao2013/redis-source-annotated,Aliceljm1/redis-3.0-annotated,iandyh/redis,hawkchch/redis,charsyam/redis,gilala/hbjredis,YongMan/redis,onlymellb/redis-3.0-annotated,msn217/redis-3.0-annotated,charsyam/redis,hawkchch/redis,xuguruogu/redis,PradheepShrinivasan/redis,flashbuckets/redis,AplayER/redis,buobao/redis-3.0-annotated,mumingv/redis-3.0-annotated,riyan8250/redis,MasahikoSawada/redis,zhaobo1023/redis-3.0-annotated,WorkingOfTimtohyZhang/redis-3.0-annotated,OmarQunsul/graph-redis,zguangyu/redis,ChanningDuan/annotated_redis_source,ttuna/msot-redis,devaos/redis,shreesundara/redis,kaushik94/redis,gilala/hredis,YuanZhewei/redis,spinlock/redis,devaos/redis,buobao/redis-3.0-annotated,msn217/redis-3.0-annotated,yuzhangjob/redis-3.0-annotated-unstable,gongice/redis-3.0-annotated,WorkingOfTimtohyZhang/redis-3.0-annotated,MSOpenTech/redis,dongqifan2/redis-3.0-annotated,jingjidejuren/redis,figoxu/annotated_redis_source,ofirluzon/redis,mumingv/redis-3.0-annotated,healerkx/redis,honestme/redis,mverrilli/redis,riyan8250/redis,JoeWoo/redis,narma/redis,idning/redis,SyntaxStacks/redis,pedigree/redis,pkdevbox/redis,rogerchina/redis,wujf/redis,huangz1990/annotated_redis_source,gongice/redis-3.0-annotated,zhiliaoniu/redis,yybirdcf/learn-redis,Sciumo/redis,shshlzh/redis-3.0-annotated,zy416548283/redis-3.0-annotated,mgk/redis,pkdevbox/redis,Aliceljm1/redis,GrimDerp/redis,ErikDubbelboer/redis,ReadCode/redis-3.0-annotated,linfangrong/redis,charsyam/redis,july2993/redis,Wangyao14cyy/redis,pietern/redis,yuhc/redis-benchmark-enhanced,davidradunz/redis,valdsJohn/redis,wujf/redis,buobao/redis-3.0-annotated,0x20h/redis,pietern/redis,atreeyang/redis,yuhc/redis-benchmark-enhanced,janekmi/redis,gilala/bjredis,a-pavlov/redis,jermnelson/redis,soveran/redis,nuxeh/redis,mingyaaaa/redis,ramonsnir/redis,StevenTsai/redis,rouzier/redis,RepmujNetsik/redis,cnbin/redis,wenxueliu/redis_comment,guker/redis,tanghaodong25/redis,devaos/redis,huangz1990/experiment-redis,unasm/redis-3.0-annotated,RepmujNetsik/redis,HunanTV/redis,zczhuohuo/redis,moonbingbing/redis-3.0-annotated,Aliceljm1/redis,thomasdarimont/redis,0x20h/redis,wprice/redis,universsky/redis,aluzzardi/redis,ton31337/redis,danny200309/annotated_redis_source,mgk/redis,wuyu201321060203/redis-3.0-annotated,weizijun/redis,ttuna/msot-redis,wenxueliu/redis_comment,allengaller/redis,tidatida/annotated_redis_source,jasonkying/redis,ChaosCoo/annotated_redis_source,AplayER/redis,NBSW/redis,seandsky/redis,yuzhangjob/redis-3.0-annotated-unstable,YuanZhewei/redis,clamoriniere1A/redis,neomantra/redis,adamweixuan/redis-3.0-annotated,kmiku7/redis,wprice/redis,arijitvt/redis,pcarrier/redis,harrisonfeng/redis,mgk/redis,AALEKH/redis,jacklee0810/redis-3.0-annotated,atreeyang/redis,wuxiaowei907/annotated_redis_source,timothyohare/3rdPartySrc-redis,cusspvz/redis,tidatida/annotated_redis_source,roth1002/redis,louisliangjun/redis,soloestoy/redis,devaos/redis,izhoujie/redis,csuhawk/redis,tellapart/redis,rogerlz/redis,alenslan/redis,dayuoba/redis,CodeJuan/redis,ipmobiletech/redis,jasonkying/redis,h0x91b/redis,shining-yang/redis,ofirluzon/redis,jbochi/parallel_redis,sunlianqiang/redis-3.0-annotated,jermnelson/redis,zhiliaoniu/redis,ctripcorp/redis,RepmujNetsik/redis,YongMan/redis,ksarch-saas/redis,huyuezheng/redis,j0hnma/hszredis,JoeWoo/redis,sunheehnus/redis,jxwr/redis,msn217/redis-3.0-annotated,RepmujNetsik/redis,SummonY/redis,Markgorden/redis,Wangyao14cyy/redis,MasahikoSawada/redis,Aaron1992/redis,pmem/redis,aim-for-better/redis,zczhuohuo/redis,ouyangkongtong/redis,dayuoba/redis,simplestbest/redis,jermnelson/redis,StevenTsai/redis,xuguruogu/redis,mverrilli/redis,zhaobo1023/redis-3.0-annotated,haima-zju/redis-3.0-annotated,ituncle/redis,louisliangjun/redis,zhoudayang/redis,netroby/redis,PKRoma/redis,aim-for-better/redis,clamoriniere1A/redis,soloestoy/redis,aim-for-better/redis,supasate/redis,hedisdb/hedis,simplestbest/redis,gaoxianglong/redis,netroby/redis,blackmady/redis,PKRoma/redis,YuraLukashik/redis,alenslan/redis,zczhuohuo/redis,wprice/redis,louisliangjun/redis,xlzhan/redis,gechong/redis-3.0-annotated,elkingtonmcb/redis,tzq668766/redis-3.0-annotated,SummonY/redis,mattsta/redis,mattsta/redis,holstvoogd/redis,gechong/redis-3.0-annotated,jbochi/redis,himoca/redis,pietern/redis,rouzier/redis,mpalmer/redis,Hailei/redis,itugs/redis,fengshao0907/redis,dongqifan2/redis-3.0-annotated,duanx/redis,vincent-vivian-liu/redis,charsyam/redis,seppo0010/redis,ReadCode/redis-3.0-annotated,programmecat/redis,fengshao0907/redis,rogerchina/redis,wuxiaowei907/annotated_redis_source,0x55/redis-3.0-annotated,gilala/bjredis,rogerchina/redis,mcanthony/redis,antirez/redis,wangyikai/redis,alenslan/redis,spinlock/redis,seandsky/redis,xuzhezhaozhao/redis_reading,soveran/redis,tzq668766/redis-3.0-annotated,wbailey5/redis,nuxeh/redis,mcanthony/redis,MSOpenTech/redis,HunanTV/redis,Cisphyx/redis-websockets,sunheehnus/redis,yossigo/redis,rrsean/redis-3.0-annotated,francischan714/redis,YuraLukashik/redis,HouKangkang/redis-3.0-annotated,rrsean/redis-3.0-annotated,ramonsnir/redis,YuanZhewei/redis,danny200309/annotated_redis_source,whille/redis-3.0-annotated,sunlianqiang/redis-3.0-annotated,pmem/redis,antirez/redis,ofirluzon/redis,tellapart/redis,shining-yang/redis,yybirdcf/learn-redis,yossigo/redis,hedisdb/hedis,huyuezheng/redis,gilala/bjredis,iandyh/redis,viongpanzi/annotated_redis_source,jasonkying/redis,GrimDerp/redis,july2993/redis,guker/redis,wuyu201321060203/redis-3.0-annotated,valdsJohn/redis,healerkx/redis,ipmobiletech/redis,z-fork/redis,NBSW/redis,huangz1990/annotated_redis_source,july2993/redis,jacklee0810/annotated_redis_source,pkdevbox/redis,jacklee0810/annotated_redis_source,jacklee0810/redis-3.0-annotated,nilyang/redis-tdd-annotation,HouKangkang/redis-3.0-annotated,ouyangkongtong/redis,izhoujie/redis,saisai/redis,timothyohare/3rdPartySrc-redis,j0hnma/szredis,huangz1990/experiment-redis,Sciumo/redis,rouzier/redis,Soledad89/redis,universsky/redis,mumingv/redis,jacklee0810/annotated_redis_source,tzq668766/redis-3.0-annotated,sunlianqiang/redis-3.0-annotated,seppo0010/redis,190235047/redis,Aliceljm1/redis,takeshineshiro/redis,fengshao0907/redis-3.0-annotated,neomantra/redis,a-pavlov/redis,YongMan/redis,badboy/redis,gilala/hbjredis,Cisphyx/redis-websockets,flashbuckets/redis,wuyu201321060203/redis-3.0-annotated,netroby/redis,colstrom/redis,a-pavlov/redis,Wangyao14cyy/redis,dreamquster/redis,jingjidejuren/redis,PradheepShrinivasan/redis,slfs007/mk-redis,supasate/redis,mengzhejin/RedisStudy,blackmady/redis,blackmady/redis,tjschuck/redis,pedigree/redis,aim-for-better/redis,sunheehnus/redis,Aliceljm1/redis-3.0-annotated,valdsJohn/redis,ipmobiletech/redis,moonbingbing/redis-3.0-annotated,jackyan/redis,clamoriniere1A/redis,nuxeh/redis,flashbuckets/redis,abhiklodh/redis,xlzhan/redis,GitHubMota/redis,darksideofthemoo/redis-histogram,JoeWoo/redis,oranagra/redis,CodeJuan/redis,4396/redis,huangz1990/redis-3.0-annotated,mumingv/redis,alenslan/redis,colstrom/redis,ituncle/redis,YuanZhewei/redis,WorkingOfTimtohyZhang/redis-3.0-annotated,h0x91b/redis,ChaosCoo/annotated_redis_source,mcanthony/redis,colstrom/redis,jingjidejuren/redis,zhcy/redis,onlymellb/redis-3.0-annotated,kaushik94/redis,pkdevbox/redis,OmarQunsul/graph-redis,jbochi/redis,oranagra/redis,zhcy/redis,shining-yang/redis,sunheehnus/redis,soveran/redis,mpalmer/redis,xujunhai1991/redis,mattsta/redis,duanx/redis,haima-zju/redis-3.0-annotated,ncopa/redis,rogerlz/redis,yossigo/redis,mengyou0304/redis,GrimDerp/redis,maodeyi/redis_lua,SyntaxStacks/redis,idning/redis,narma/redis,twskipper/redis,zguangyu/redis,cusspvz/redis,wangyikai/redis,ksarch-saas/redis,oranagra/redis,figoxu/annotated_redis_source,darksideofthemoo/redis-histogram,zy416548283/redis-3.0-annotated,tanghaodong25/redis,hornen/redis,pietern/redis,magastzheng/redis-3.0-annotated,elkingtonmcb/redis,holstvoogd/redis,timothyohare/3rdPartySrc-redis,mingyaaaa/redis,cloudrain21/redis,gilala/bjredis,idning/redis,roth1002/redis,MOON-CLJ/redis,modulexcite/redis,louisliangjun/redis,duanx/redis,iandyh/redis,zy416548283/redis-3.0-annotated,allengaller/redis,z-fork/redis,dayuoba/redis,soveran/redis,hgl888/redis,simplestbest/redis,Hailei/redis,himoca/redis,mengyou0304/redis,hedisdb/hedis,pmem/redis,Cisphyx/redis-websockets,antirez/redis,twskipper/redis,shreesundara/redis,abhiklodh/redis,SyntaxStacks/redis,linfangrong/redis,nuxeh/redis,spearhead-ea/redis,itamarhaber/redis,hhli/redis,dongqifan2/redis-3.0-annotated,taoguan/redis,190235047/redis,jacklee0810/redis-3.0-annotated,pedigree/redis,GitHubMota/redis,saisai/redis,j0hnma/szredis,csuhawk/redis,roth1002/redis,hhli/redis,miaoyc1989/redis-3.0-annotated,4396/redis,GitHubMota/redis,cloudrain21/redis,izhoujie/redis,SummonY/redis,ytjiang/redis,0x20h/redis,cusspvz/redis,modulexcite/redis,seppo0010/rlite-server,gilala/redis,SummonY/redis,arijitvt/redis,itamarhaber/redis,xujunhai1991/redis,linfangrong/redis,ReadCode/redis-3.0-annotated,wangyikai/redis,mengzhejin/RedisStudy,huangz1990/experiment-redis,ituncle/redis,LongXQ/redis,honestme/redis,holstvoogd/redis,netroby/redis,dreamquster/redis,iandyh/redis,arijitvt/redis,z-fork/redis,davidradunz/redis,harrisonfeng/redis,mumingv/redis-3.0-annotated,simplestbest/redis,a-pavlov/redis,Aaron1992/redis,cnbin/redis,shreesundara/redis,idning/redis,rogerlz/redis,tjschuck/redis,0x55/redis-3.0-annotated,xuzhezhaozhao/redis_reading,0x55/redis-3.0-annotated,zguangyu/redis,yuhc/redis-benchmark-enhanced,maodeyi/redis_lua,seppo0010/rlite-server,cusspvz/redis,allengaller/redis,gaoxianglong/redis,hornen/redis,wbailey5/redis,hhli/redis,dramenk/annotated_redis_source,xlzhan/redis,qiyang0221/redis,shreesundara/redis,hedisdb/hedis,cloudrain21/redis,seandsky/redis,wuxiaowei907/annotated_redis_source,gilala/hredis,taoguan/redis,ErikDubbelboer/redis,neomantra/redis,josiahcarlson/redis,gechong/redis-3.0-annotated,pedigree/redis,Markgorden/redis,HeartSaVioR/redis,nnog/redis,dramenk/annotated_redis_source,guker/redis,elkingtonmcb/redis,gongice/redis-3.0-annotated,PradheepShrinivasan/redis,clamoriniere1A/redis,zhoudayang/redis,nnog/redis,nnog/redis,jbochi/parallel_redis,pmem/redis,saisai/redis,wprice/redis,kensou97/redis,slfs007/mk-redis,taoguan/redis,thomasdarimont/redis,machicao2013/redis-source-annotated,j0hnma/szredis,jackyan/redis,ksarch-saas/redis,StevenTsai/redis,ton31337/redis,thomasdarimont/redis,yybirdcf/learn-redis,aluzzardi/redis,wuyu201321060203/redis-3.0-annotated,fengshao0907/redis-3.0-annotated,Cisphyx/redis-websockets,supasate/redis,ctripcorp/redis,thomasdarimont/redis,ctripcorp/redis,hgl888/redis,mingyaaaa/redis,honestme/redis,soloestoy/redis,neomantra/redis,YuraLukashik/redis,healerkx/redis,hgl888/redis,unasm/redis-3.0-annotated,mpalmer/redis,janekmi/redis,YuraLukashik/redis,adamweixuan/redis-3.0-annotated,OmarQunsul/graph-redis,whille/redis-3.0-annotated,hgl888/redis,j0hnma/hszredis,4396/redis,kmiku7/redis,abhiklodh/redis,0x55/redis-3.0-annotated,mverrilli/redis,0x20h/redis,HunanTV/redis,Aliceljm1/redis-3.0-annotated,gilala/redis,HunanTV/redis,Sciumo/redis,universsky/redis,atreeyang/redis,figoxu/annotated_redis_source,huangz1990/redis-3.0-annotated,wangyikai/redis,fengshao0907/annotated_redis_source,itugs/redis,ksarch-saas/redis,twskipper/redis,drinkthere/redis-3.0-annotated,spinlock/redis,elkingtonmcb/redis,hornen/redis,jxwr/redis,gilala/redis,ytjiang/redis,jackyan/redis,gilala/hbjredis,badboy/redis,magastzheng/redis-3.0-annotated,brg-liuwei/redis,Wangyao14cyy/redis,modulexcite/redis,dreamquster/redis,PradheepShrinivasan/redis,nilyang/redis-tdd-annotation,Sciumo/redis,shshlzh/redis-3.0-annotated,Soledad89/redis,machicao2013/redis-source-annotated,zhoudayang/redis,huangz1990/experiment-redis,xuguruogu/redis,danny200309/annotated_redis_source,maodeyi/redis_lua,nilyang/redis-tdd-annotation,izhoujie/redis,linfangrong/redis,brg-liuwei/redis,j0hnma/szredis,modulexcite/redis,twskipper/redis,xlzhan/redis,fengshao0907/redis,miaoyc1989/redis-3.0-annotated,kaushik94/redis,ipmobiletech/redis,programmecat/redis,fengshao0907/annotated_redis_source,csuhawk/redis,hornen/redis,himoca/redis,weizijun/redis,wujf/redis,saisai/redis,spinlock/redis,aluzzardi/redis,holstvoogd/redis,wujf/redis,ncopa/redis,HeartSaVioR/redis,HeartSaVioR/redis,abhiklodh/redis,HeartSaVioR/redis,onlymellb/redis-3.0-annotated,fengshao0907/annotated_redis_source,riyan8250/redis,duanx/redis,mumingv/redis,z-fork/redis,splitice/redis,Aaron1992/redis,allengaller/redis,viongpanzi/annotated_redis_source,huangz1990/annotated_redis_source,ramonsnir/redis,dramenk/annotated_redis_source,roth1002/redis,kaushik94/redis,rogerlz/redis,vincent-vivian-liu/redis,guker/redis,miaoyc1989/redis-3.0-annotated,citusdata/redis,AALEKH/redis,blackmady/redis,seppo0010/redis,zhiliaoniu/redis,Aliceljm1/redis,soloestoy/redis,itugs/redis,yuzhangjob/redis-3.0-annotated-unstable,janekmi/redis,fankeke/redis-3.0-annotated,tellapart/redis,supasate/redis,dayuoba/redis,rogerchina/redis,cnbin/redis,ytjiang/redis,Markgorden/redis,wenxueliu/redis_comment,mengzhejin/RedisStudy,shshlzh/redis-3.0-annotated,j0hnma/hszredis,tjschuck/redis,MasahikoSawada/redis,fankeke/redis-3.0-annotated,davidradunz/redis,spearhead-ea/redis,weizijun/redis,kmiku7/redis,h0x91b/redis,zczhuohuo/redis,gspandy/annotated_redis_source,gspandy/annotated_redis_source,soloestoy/redis,slfs007/mk-redis,AALEKH/redis,drinkthere/redis-3.0-annotated,josiahcarlson/redis