Sentinel: fake PUBLISH command to receive HELLO messages.
Sentinel: fake PUBLISH command to receive HELLO messages.

Now the way HELLO messages are received is unified.
Now it is no longer needed for Sentinels to converge to the higher
configuration for a master to be able to chat via some Redis instance,
the are able to directly exchanges configurations.

Note that this commit does not include the (trivial) change needed to
send HELLO messages to Sentinel instances as well, since for an error I
committed the change in the previous commit that refactored hello
messages processing into a separated function.

sunheehnus/redis,tellapart/redis,xlzhan/redis,zhcy/redis,weizijun/redis,YuanZhewei/redis,zhiliaoniu/redis,janekmi/redis,gilala/bjredis,CodeJuan/redis,kensou97/redis,jbochi/redis,MasahikoSawada/redis,wbailey5/redis,charsyam/redis,supasate/redis,xujunhai1991/redis,j0hnma/hszredis,pedigree/redis,GrimDerp/redis,gilala/hbjredis,roth1002/redis,ituncle/redis,harrisonfeng/redis,nnog/redis,mingyaaaa/redis,gilala/hbjredis,itamarhaber/redis,GitHubMota/redis,nnog/redis,190235047/redis,zguangyu/redis,Aaron1992/redis,universsky/redis,neomantra/redis,jackyan/redis,mengyou0304/redis,charsyam/redis,mverrilli/redis,j0hnma/szredis,xuguruogu/redis,j0hnma/hszredis,nuxeh/redis,charsyam/redis,a-pavlov/redis,kensou97/redis,janekmi/redis,vincent-vivian-liu/redis,PKRoma/redis,colstrom/redis,timothyohare/3rdPartySrc-redis,seandsky/redis,pmem/redis,programmecat/redis,itugs/redis,jasonkying/redis,shreesundara/redis,programmecat/redis,saisai/redis,ErikDubbelboer/redis,neomantra/redis,modulexcite/redis,yossigo/redis,dayuoba/redis,SyntaxStacks/redis,zguangyu/redis,hgl888/redis,neomantra/redis,soloestoy/redis,wbailey5/redis,ipmobiletech/redis,xujunhai1991/redis,valdsJohn/redis,wangyikai/redis,mverrilli/redis,YuraLukashik/redis,devaos/redis,itugs/redis,soveran/redis,hedisdb/hedis,izhoujie/redis,h0x91b/redis,linfangrong/redis,mverrilli/redis,AALEKH/redis,twskipper/redis,harrisonfeng/redis,colstrom/redis,pmem/redis,brg-liuwei/redis,CodeJuan/redis,fengshao0907/redis,sunheehnus/redis,rogerlz/redis,brg-liuwei/redis,LongXQ/redis,hgl888/redis,gilala/hredis,honestme/redis,mengzhejin/RedisStudy,SyntaxStacks/redis,ouyangkongtong/redis,4396/redis,timothyohare/3rdPartySrc-redis,colstrom/redis,universsky/redis,netroby/redis,ytjiang/redis,j0hnma/szredis,roth1002/redis,huyuezheng/redis,charsyam/redis,narma/redis,universsky/redis,JoeWoo/redis,wujf/redis,NBSW/redis,yossigo/redis,brg-liuwei/redis,xujunhai1991/redis,citusdata/redis,fengshao0907/redis,190235047/redis,Aaron1992/redis,HeartSaVioR/redis,mgk/redis,csuhawk/redis,simplestbest/redis,hawkchch/redis,devaos/redis,mcanthony/redis,4396/redis,a-pavlov/redis,alenslan/redis,yuhc/redis-benchmark-enhanced,kaushik94/redis,takeshineshiro/redis,wujf/redis,rouzier/redis,pkdevbox/redis,supasate/redis,blackmady/redis,yossigo/redis,jingjidejuren/redis,josiahcarlson/redis,xujunhai1991/redis,thomasdarimont/redis,gilala/redis,charsyam/redis,wenxueliu/redis_comment,mengyou0304/redis,sunheehnus/redis,OmarQunsul/graph-redis,SyntaxStacks/redis,pcarrier/redis,seppo0010/rlite-server,healerkx/redis,francischan714/redis,arijitvt/redis,JoeWoo/redis,wenxueliu/redis_comment,duanx/redis,OmarQunsul/graph-redis,NBSW/redis,simplestbest/redis,spinlock/redis,shining-yang/redis,190235047/redis,seppo0010/redis,soloestoy/redis,narma/redis,MasahikoSawada/redis,AALEKH/redis,elkingtonmcb/redis,takeshineshiro/redis,rogerlz/redis,cnbin/redis,xlzhan/redis,hedisdb/hedis,valdsJohn/redis,shreesundara/redis,vincent-vivian-liu/redis,Sciumo/redis,jbochi/redis,cnbin/redis,huyuezheng/redis,kensou97/redis,rogerchina/redis,ytjiang/redis,elkingtonmcb/redis,wbailey5/redis,z-fork/redis,ituncle/redis,j0hnma/hszredis,spinlock/redis,iandyh/redis,ctripcorp/redis,riyan8250/redis,iandyh/redis,riyan8250/redis,gilala/hbjredis,ipmobiletech/redis,pedigree/redis,YongMan/redis,gilala/bjredis,harrisonfeng/redis,timothyohare/3rdPartySrc-redis,blackmady/redis,hawkchch/redis,oranagra/redis,cloudrain21/redis,hgl888/redis,gilala/bjredis,rogerlz/redis,jackyan/redis,twskipper/redis,a-pavlov/redis,RepmujNetsik/redis,tellapart/redis,hornen/redis,ctripcorp/redis,SummonY/redis,yuhc/redis-benchmark-enhanced,devaos/redis,j0hnma/szredis,francischan714/redis,gilala/redis,cloudrain21/redis,cnbin/redis,HeartSaVioR/redis,rogerchina/redis,wangyikai/redis,modulexcite/redis,vincent-vivian-liu/redis,antirez/redis,LongXQ/redis,4396/redis,ofirluzon/redis,wprice/redis,PradheepShrinivasan/redis,francischan714/redis,yossigo/redis,cnbin/redis,GrimDerp/redis,RepmujNetsik/redis,pmem/redis,flashbuckets/redis,mverrilli/redis,gaoxianglong/redis,neomantra/redis,xlzhan/redis,badboy/redis,flashbuckets/redis,ncopa/redis,MOON-CLJ/redis,zczhuohuo/redis,seandsky/redis,PradheepShrinivasan/redis,takeshineshiro/redis,cusspvz/redis,july2993/redis,z-fork/redis,seppo0010/rlite-server,ton31337/redis,wprice/redis,ctripcorp/redis,qiyang0221/redis,shreesundara/redis,july2993/redis,iandyh/redis,kaushik94/redis,josiahcarlson/redis,roth1002/redis,zczhuohuo/redis,ofirluzon/redis,rouzier/redis,AALEKH/redis,ouyangkongtong/redis,zhiliaoniu/redis,dayuoba/redis,shining-yang/redis,arijitvt/redis,antirez/redis,kmiku7/redis,z-fork/redis,huyuezheng/redis,mengzhejin/RedisStudy,yossigo/redis,wprice/redis,mgk/redis,yuhc/redis-benchmark-enhanced,soveran/redis,taoguan/redis,Aaron1992/redis,wujf/redis,gaoxianglong/redis,h0x91b/redis,holstvoogd/redis,ErikDubbelboer/redis,MOON-CLJ/redis,jingjidejuren/redis,oranagra/redis,honestme/redis,supasate/redis,weizijun/redis,thomasdarimont/redis,SummonY/redis,itugs/redis,flashbuckets/redis,alenslan/r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edis,shreesundara/redis,clamoriniere1A/redis,riyan8250/redis,aim-for-better/redis,gilala/hbjredis,alenslan/redis,Soledad89/redis,hgl888/redis,hawkchch/redis,nnog/redis,duanx/redis,qiyang0221/redis,HeartSaVioR/redis,harrisonfeng/redis,hedisdb/hedis,hawkchch/redis,xuguruogu/redis,YuraLukashik/redis,wbailey5/redis,clamoriniere1A/redis,seppo0010/rlite-server,gaoxianglong/redis,abhiklodh/redis,rogerchina/redis,mengyou0304/redis,seandsky/redis,allengaller/redis,healerkx/redis,izhoujie/redis,ErikDubbelboer/redis,aim-for-better/redis,mcanthony/redis,gilala/bjredis,shining-yang/redis,CodeJuan/redis,jackyan/redis,seppo0010/redis,mattsta/redis,roth1002/redis,holstvoogd/redis