Cluster: myself->ip autodiscovery.
Cluster: myself->ip autodiscovery.

Instead of having an hardcoded IP address in the node configuration, we
autodiscover it via MEET messages for automatic update when the node is
restarted with a different IP address.

This mechanism was discussed in the context of PR #1782.

badboy/redis,pcarrier/redis,brg-liuwei/redis,PradheepShrinivasan/redis,gaoxianglong/redis,JoeWoo/redis,soveran/redis,charsyam/redis,mgk/redis,AplayER/redis,ituncle/redis,SummonY/redis,atreeyang/redis,colstrom/redis,tjschuck/redis,GitHubMota/redis,kensou97/redis,valdsJohn/redis,PKRoma/redis,spinlock/redis,LongXQ/redis,simplestbest/redis,duanx/redis,wangyikai/redis,shining-yang/redis,saisai/redis,gilala/hbjredis,neomantra/redis,simplestbest/redis,zhiliaoniu/redis,tellapart/redis,ituncle/redis,alenslan/redis,allengaller/redis,weizijun/redis,AALEKH/redis,itamarhaber/redis,xujunhai1991/redis,universsky/redis,izhoujie/redis,wbailey5/redis,GitHubMota/redis,rogerlz/redis,honestme/redis,josiahcarlson/redis,soveran/redis,cloudrain21/redis,iandyh/redis,netroby/redis,wangyikai/redis,AplayER/redis,pmem/redis,itamarhaber/redis,4396/redis,atreeyang/redis,tanghaodong25/redis,OmarQunsul/graph-redis,flashbuckets/redis,cloudrain21/redis,mumingv/redis,charsyam/redis,j0hnma/szredis,j0hnma/hszredis,StevenTsai/redis,mingyaaaa/redis,tellapart/redis,StevenTsai/redis,wujf/redis,a-pavlov/redis,zguangyu/redis,antirez/redis,csuhawk/redis,citusdata/redis,seandsky/redis,qiyang0221/redis,qiyang0221/redis,weizijun/redis,mengyou0304/redis,Soledad89/redis,jasonkying/redis,jackyan/redis,Sciumo/redis,devaos/redis,AplayER/redis,h0x91b/redis,holstvoogd/redis,StevenTsai/redis,holstvoogd/redis,cusspvz/redis,roth1002/redis,rogerchina/redis,ton31337/redis,YuanZhewei/redis,LongXQ/redis,Markgorden/redis,honestme/redis,shining-yang/redis,ituncle/redis,soloestoy/redis,SummonY/redis,francischan714/redis,hedisdb/hedis,huyuezheng/redis,harrisonfeng/redis,citusdata/redis,valdsJohn/redis,francischan714/redis,wujf/redis,hawkchch/redis,yuhc/redis-benchmark-enhanced,cnbin/redis,twskipper/redis,mcanthony/redis,pcarrier/redis,Sciumo/redis,shining-yang/redis,janekmi/redis,seppo0010/redis,valdsJohn/redis,oranagra/redis,gilala/bjredis,wbailey5/redis,rouzier/redis,JoeWoo/redis,zhiliaoniu/redis,shining-yang/redis,devaos/redis,oranagra/redis,shreesundara/redis,seandsky/redis,kaushik94/redis,huyuezheng/redis,huyuezheng/redis,SyntaxStacks/redis,xujunhai1991/redis,simplestbest/redis,cnbin/redis,CodeJuan/redis,timothyohare/3rdPartySrc-redis,weizijun/redis,pmem/redis,elkingtonmcb/redis,ton31337/redis,badboy/redis,ofirluzon/redis,z-fork/redis,j0hnma/hszredis,programmecat/redis,kaushik94/redis,charsyam/redis,aim-for-better/redis,mgk/redis,abhiklodh/redis,OmarQunsul/graph-redis,itugs/redis,yuhc/redis-benchmark-enhanced,Aliceljm1/redis,gaoxianglong/redis,valdsJohn/redis,programmecat/redis,izhoujie/redis,csuhawk/redis,itamarhaber/redis,dayuoba/redis,soloestoy/redis,oranagra/redis,pkdevbox/redis,jingjidejuren/redis,ofirluzon/redis,RepmujNetsik/redis,brg-liuwei/redis,qiyang0221/redis,cnbin/redis,citusdata/redis,pkdevbox/redis,rogerlz/redis,a-pavlov/redis,PKRoma/redis,roth1002/redis,xlzhan/redis,yossigo/redis,zczhuohuo/redis,rogerlz/redis,wbailey5/redis,flashbuckets/redis,seppo0010/redis,ouyangkongtong/redis,j0hnma/hszredis,alenslan/redis,netroby/redis,hgl888/redis,antirez/redis,seppo0010/rlite-server,ouyangkongtong/redis,janekmi/redis,Markgorden/redis,MOON-CLJ/redis,riyan8250/redis,seandsky/redis,xujunhai1991/redis,honestme/redis,ctripcorp/redis,jingjidejuren/redis,Soledad89/redis,xlzhan/redis,MasahikoSawada/redis,blackmady/redis,saisai/redis,nuxeh/redis,seppo0010/rlite-server,StevenTsai/redis,mcanthony/redis,nuxeh/redis,rouzier/redis,gilala/hbjredis,tanghaodong25/redis,seppo0010/rlite-server,blackmady/redis,july2993/redis,modulexcite/redis,cloudrain21/redis,universsky/redis,nnog/redis,tjschuck/redis,ctripcorp/redis,zguangyu/redis,jackyan/redis,zhcy/redis,wangyikai/redis,hedisdb/hedis,soloestoy/redis,nnog/redis,charsyam/redis,arijitvt/redis,gilala/bjredis,holstvoogd/redis,wenxueliu/redis_comment,flashbuckets/redis,MOON-CLJ/redis,fengshao0907/redis,healerkx/redis,pmem/redis,xuguruogu/redis,a-pavlov/redis,kmiku7/redis,nuxeh/redis,mengyou0304/redis,AALEKH/redis,mengzhejin/RedisStudy,MasahikoSawada/redis,sunheehnus/redis,zhiliaoniu/redis,gaoxianglong/redis,MasahikoSawada/redis,abhiklodh/redis,hgl888/redis,PradheepShrinivasan/redis,hornen/redis,zczhuohuo/redis,spinlock/redis,yuhc/redis-benchmark-enhanced,programmecat/redis,universsky/redis,gilala/hbjredis,YuanZhewei/redis,janekmi/redis,iandyh/redis,mverrilli/redis,ipmobiletech/redis,clamoriniere1A/redis,4396/redis,ErikDubbelboer/redis,OmarQunsul/graph-redis,RepmujNetsik/redis,ton31337/redis,NBSW/redis,fengshao0907/redis,mingyaaaa/redis,yossigo/redis,Markgorden/redis,PradheepShrinivasan/redis,mumingv/redis,xujunhai1991/redis,ipmobiletech/redis,mengzhejin/RedisStudy,Wangyao14cyy/redis,guker/redis,arijitvt/redis,josiahcarlson/redis,hedisdb/hedis,mcanthony/redis,LongXQ/redis,netroby/redis,tanghaodong25/redis,YongMan/redis,francischan714/redis,thomasdarimont/redis,pkdevbox/redis,SyntaxStacks/redis,mingyaaaa/redis,GrimDerp/redis,seppo0010/redis,YongMan/redis,PKRoma/redis,ytjiang/redis,hawkchch/redis,sunheehnus/redis,MasahikoSawada/redis,neomantra/redis,wenxueliu/redis_comment,thomasdarimont/redis,AALEKH/redis,arijitvt/redis,wprice/redis,ncopa/redis,modulexcite/redis,spinlock/redis,narma/redis,saisai/redis,ctripcorp/redis,PradheepShrinivasan/redis,duanx/redis,spinlock/redis,OmarQunsul/graph-redis,zhcy/redis,itugs/redis,z-fork/redis,modulexcite/redis,GrimDerp/redis,hornen/redis,abhiklodh/redis,neomantra/redis,duanx/redis,linfangrong/redis,taoguan/redis,yossigo/redis,pedigree/redis,z-fork/redis,tellapart/redis,soloestoy/redis,dayuoba/redis,rouzier/redis,4396/redis,MOON-CLJ/redis,tjschuck/redis,takeshineshiro/redis,ytjiang/redis,xuguruogu/redis,ofirluzon/redis,dayuoba/redis,brg-liuwei/redis,jingjidejuren/redis,taoguan/redis,jasonkying/redis,taoguan/redis,oranagra/redis,seandsky/redis,ncopa/redis,pcarrier/redis,colstrom/redis,supasate/redis,YuraLukashik/redis,devaos/redis,Wangyao14cyy/redis,allengaller/redis,Soledad89/redis,colstrom/redis,YuraLukashik/redis,cnbin/redis,dreamquster/redis,atreeyang/redis,july2993/redis,SummonY/redis,ErikDubbelboer/redis,linfangrong/redis,elkingtonmcb/redis,ncopa/redis,gilala/redis,guker/redis,a-pavlov/redis,ofirluzon/redis,taoguan/redis,csuhawk/redis,kensou97/redis,190235047/redis,xlzhan/redis,josiahcarlson/redis,gilala/bjredis,izhoujie/redis,RepmujNetsik/redis,cusspvz/redis,shreesundara/redis,pkdevbox/redis,weizijun/redis,dreamquster/redis,july2993/redis,gilala/redis,tjschuck/redis,gaoxianglong/redis,harrisonfeng/redis,shreesundara/redis,narma/redis,jasonkying/redis,NBSW/redis,xuguruogu/redis,healerkx/redis,rogerchina/redis,supasate/redis,ipmobiletech/redis,arijitvt/redis,zhcy/redis,healerkx/redis,rouzier/redis,abhiklodh/redis,h0x91b/redis,takeshineshiro/redis,vincent-vivian-liu/redis,zguangyu/redis,h0x91b/redis,wprice/redis,pedigree/redis,badboy/redis,hgl888/redis,riyan8250/redis,pmem/redis,aim-for-better/redis,gilala/redis,devaos/redis,gilala/hredis,zczhuohuo/redis,CodeJuan/redis,blackmady/redis,j0hnma/szredis,190235047/redis,seppo0010/redis,iandyh/redis,itamarhaber/redis,zhcy/redis,YuanZhewei/redis,h0x91b/redis,jingjidejuren/redis,rogerchina/redis,pedigree/redis,NBSW/redis,dreamquster/redis,j0hnma/szredis,Aliceljm1/redis,wujf/redis,zczhuohuo/redis,kensou97/redis,wprice/redis,mgk/redis,Soledad89/redis,Wangyao14cyy/redis,j0hnma/szredis,ytjiang/redis,Sciumo/redis,YuanZhewei/redis,ton31337/redis,guker/redis,dreamquster/redis,PKRoma/redis,july2993/redis,ncopa/redis,j0hnma/hszredis,ouyangkongtong/redis,brg-liuwei/redis,twskipper/redis,cusspvz/redis,cloudrain21/redis,soveran/redis,vincent-vivian-liu/redis,aim-for-better/redis,riyan8250/redis,gilala/hredis,mattsta/redis,SyntaxStacks/redis,hawkchch/redis,davidradunz/redis,guker/redis,sunheehnus/redis,jackyan/redis,holstvoogd/redis,wenxueliu/redis_comment,yuhc/redis-benchmark-enhanced,mengyou0304/redis,mingyaaaa/redis,seppo0010/rlite-server,timothyohare/3rdPartySrc-redis,vincent-vivian-liu/redis,AplayER/redis,gilala/hredis,twskipper/redis,thomasdarimont/redis,tanghaodong25/redis,davidradunz/redis,honestme/redis,netroby/redis,roth1002/redis,duanx/redis,LongXQ/redis,aim-for-better/redis,4396/redis,qiyang0221/redis,linfangrong/redis,huyuezheng/redis,Aliceljm1/redis,linfangrong/redis,elkingtonmcb/redis,YongMan/redis,yossigo/redis,wujf/redis,mattsta/redis,antirez/redis,GrimDerp/redis,fengshao0907/redis,Wangyao14cyy/redis,ytjiang/redis,cusspvz/redis,atreeyang/redis,jasonkying/redis,davidradunz/redis,shreesundara/redis,ErikDubbelboer/redis,oranagra/redis,neomantra/redis,roth1002/redis,allengaller/redis,GrimDerp/redis,clamoriniere1A/redis,izhoujie/redis,modulexcite/redis,wprice/redis,zhiliaoniu/redis,clamoriniere1A/redis,clamoriniere1A/redis,mengzhejin/RedisStudy,janekmi/redis,pcarrier/redis,ctripcorp/redis,rogerlz/redis,mengyou0304/redis,PKRoma/redis,gilala/hredis,supasate/redis,gilala/hbjredis,hawkchch/redis,zguangyu/redis,kmiku7/redis,takeshineshiro/redis,vincent-vivian-liu/redis,wenxueliu/redis_comment,hgl888/redis,190235047/redis,SummonY/redis,elkingtonmcb/redis,ipmobiletech/redis,soveran/redis,YuraLukashik/redis,harrisonfeng/redis,timothyohare/3rdPartySrc-redis,allengaller/redis,davidradunz/redis,pedigree/redis,hedisdb/hedis,programmecat/redis,wbailey5/redis,ouyangkongtong/redis,blackmady/redis,ituncle/redis,Markgorden/redis,Aliceljm1/redis,hornen/redis,gilala/redis,charsyam/redis,timothyohare/3rdPartySrc-redis,mumingv/redis,itugs/redis,nuxeh/redis,mverrilli/redis,mverrilli/redis,saisai/redis,kaushik94/redis,jackyan/redis,kensou97/redis,itugs/redis,csuhawk/redis,YongMan/redis,kmiku7/redis,healerkx/redis,AALEKH/redis,badboy/redis,ofirluzon/redis,iandyh/redis,SyntaxStacks/redis,neomantra/redis,Aaron1992/redis,Aaron1992/redis,thomasdarimont/redis,fengshao0907/redis,riyan8250/redis,Aaron1992/redis,colstrom/redis,gilala/bjredis,antirez/redis,wangyikai/redis,universsky/redis,kaushik94/redis,narma/redis,tellapart/redis,mgk/redis,francischan714/redis,alenslan/redis,GitHubMota/redis,flashbuckets/redis,nnog/redis,CodeJuan/redis,ErikDubbelboer/redis,twskipper/redis,kmiku7/redis,josiahcarlson/redis,190235047/redis,Sciumo/redis,mattsta/redis,GitHubMota/redis,JoeWoo/redis,sunheehnus/redis,mcanthony/redis,hornen/redis,dayuoba/redis,alenslan/redis,simplestbest/redis,yossigo/redis,xlzhan/redis,NBSW/redis,YuraLukashik/redis,mumingv/redis,Aaron1992/redis,harrisonfeng/redis,rogerchina/redis,takeshineshiro/redis,nnog/redis,RepmujNetsik/redis,z-fork/redis,supasate/redis,citusdata/redis,mverrilli/redis,CodeJuan/redis,mengzhejin/RedisStudy,xuguruogu/redis,soloestoy/redis,JoeWoo/redis