CLUSTER MEET: better error messages when address is invalid.
CLUSTER MEET: better error messages when address is invalid.

Fixes issue #1734.

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