Sentinel: handle Hello messages received via slaves correctly.
Sentinel: handle Hello messages received via slaves correctly.

Even when messages are received via the slave, we should perform
operations (like adding a new Sentinel) in the context of the master.

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