Improve the warning messages when leaving a Swarm cluster
Improve the warning messages when leaving a Swarm cluster

Signed-off-by: Anil Madhavapeddy <3a02579c191f8558e3fedece867419cb15398b26@docker.com>

POLJM242/docker,amatsus/docker,amatsus/docker,splunk/docker,x1022as/docker,endophage/docker,erikstmartin/docker,raja-sami-10p/moby,mtrmac/docker,ibuildthecloud/docker,msabansal/docker,duglin/docker,rancher/docker,mtrmac/docker,kolyshkin/moby,bearstech/moby,Syntaxide/docker,xiaods/docker,paralin/docker,dsheets/moby,dgageot/docker,shhsu/docker,diogomonica/docker,cpuguy83/docker,hqhq/moby,asbjornenge/docker,AkihiroSuda/docker,splunk/docker,ripcurld0/moby,mtanlee/docker,jimjag/docker,darrenstahlmsft/moby,lixiaobing10051267/docker,bluebreezecf/docker,endophage/docker,coreos/docker,nawawi/docker,yosifkit/docker,cyphar/docker,rhatdan/storage,crosbymichael/docker,ffoysal/docker,djs55/docker,pradipd/moby,gnailuy/docker,eskaaren/docker,dims/docker,hypriot/docker,rancher/docker,catinthesky/docker,pradipd/moby,unclejack/docker,whuwxl/docker,cyphar/docker,trebonian/docker,ffoysal/docker,tonistiigi/docker,mike1729/docker,moby/moby,xuxinkun/docker,xiekeyang/docker,thtanaka/docker,konstruktoid/docker-1,KarthikNayak/docker,tklauser/docker,michael-holzheu/docker,kunalkushwaha/docker,msabansal/docker,eskaaren/docker,paralin/docker,kunalkushwaha/docker,liaoqingwei/docker,kencochrane/docker,resin-io/docker,jthelin/docker,twaugh/docker,estesp/docker,mikedougherty/docker,catinthesky/docker,rremer/moby,eskaaren/docker,lixiaobing1/docker,alfred-landrum/docker,bearstech/moby,estesp/docker,dongjoon-hyun/docker,jameszhan/docker,erikh/docker,brahmaroutu/docker,yongtang/docker,laijs/docker,darrenstahlmsft/docker,resin-io/docker,sdurrheimer/docker,akira-baruah/docker,darrenstahlmsft/docker,xiekeyang/docker,bluebreezecf/docker,dperny/docker,ibuildthecloud/docker,dsau/docker,yongtang/docker,moby/moby,ajaymdesai/docker,mtanlee/docker,dims/docker,liaoqingwei/docker,vdemeester/docker,yasiramin10p/moby,thtanaka/docker,dgageot/docker,KarthikNayak/docker,tophj-ibm/docker,harche/docker,crosbymichael/docker,tophj-ibm/moby,jwhonce/docker,brahmaroutu/docker,tagomoris/docker,dims/docker,lixiaobing1/docker,sterchelen/docker,ColinHebert/docker,justincormack/docker,jlhawn/docker,JMesser81/docker,yongtang/docker,twaugh/docker,sfsmithcha/docker,vdemeester/docker,xiekeyang/docker,docker/docker,projectatomic/docker,laijs/docker,cpuguy83/docker,imkin/moby,cloudflare/docker,xuxinkun/docker,zhuguihua/docker,maxamillion/docker,Mokolea/docker,miminar/docker,HideoYamauchi/docker,abhinavdahiya/docker,pramodhkp/moby,xiaods/docker,dmcgowan/docker,tagomoris/docker,srust/docker,ibuildthecloud/docker,jlhawn/docker,ripcurld0/moby,HuKeping/docker,rhatdan/docker,YuPengZTE/docker,allencloud/docker,yosifkit/docker,prertik/docker,nalind/docker,darrenstahlmsft/moby,jimjag/docker,hypriot/docker,bonczj/moby-json-file-logger,13W/docker,gschaetz/moby,shishir-a412ed/docker,dsau/docker,resin-io/docker,portworx/docker,YuPengZTE/docker,unclejack/docker,yummypeng/docker,yosifkit/docker,Mokolea/docker,dccurtis/docker,x1022as/docker,konstruktoid/docker-upstream,lixiaobing1/docker,sdurrheimer/docker,yp-engineering/docker,cpuguy83/docker,fcrisciani/docker,ibuildthecloud/docker,raja-sami-10p/moby,cpuguy83/docker,mkumatag/docker,cloudflare/docker,naveed-jamil-tenpearls/moby,tophj-ibm/moby,jimjag/docker,vdemeester/docker,whuwxl/docker,maxamillion/docker,Mokolea/docker,dperny/docker,fcrisciani/docker,alfred-landrum/docker,jimjag/docker,thaJeztah/docker,danyalKhaliq10p/moby,nalind/docker,PatrickLang/moby,scotttlin/docker,ColinHebert/docker,dsheets/moby,mstanleyjones/docker,Ramzec/docker,imkin/moby,tmp6154/docker,kencochrane/docker,icaoweiwei/docker,yummypeng/docker,Mokolea/docker,projectatomic/docker,tonistiigi/docker,AkihiroSuda/docker,moul/docker,13W/docker,erikh/docker,coreos/docker,imkin/moby,docker/docker,tonistiigi/docker,sfsmithcha/docker,fcrisciani/docker,scotttlin/docker,haveatry/docker,pramodhkp/moby,q384566678/docker,POLJM242/docker,allencloud/docker,thtanaka/docker,duglin/docker,duglin/docker,SvenDowideit/docker,yasiramin10p/moby,mikedougherty/docker,HideoYamauchi/docker,dongjoon-hyun/docker,thaJeztah/docker,tophj-ibm/moby,abhinavdahiya/docker,flavio/docker,rremer/moby,sdurrheimer/docker,mahak/docker,gjaskiewicz/moby,flavio/docker,afein/docker,madhanrm/docker,ndeloof/docker,haveatry/docker,mikebrow/docker,docker/docker,dmcgowan/docker,bonczj/moby-json-file-logger,allencloud/docker,yummypeng/docker,cyphar/docker,coolljt0725/docker,johnstep/moby-moby,tklauser/docker,rhatdan/docker,YuPengZTE/docker,thaJeztah/docker,jvanz/docker,jvanz/docker,noironetworks/docker,PatrickLang/moby,jwhonce/docker,splunk/docker,KingEmet/docker,charleszheng44/moby,noironetworks/docker,jlebon/docker,dccurtis/docker,estesp/docker,gjaskiewicz/moby,konstruktoid/docker-upstream,moul/docker,nalind/docker,rremer/moby,portworx/docker,moul/docker,maxamillion/docker,mixja/docker,bluebreezecf/docker,nalind/docker,Ramzec/docker,flavio/docker,ColinHebert/docker,mikedougherty/docker,AkihiroSuda/docker,gschaetz/moby,konstruktoid/docker-1,moby/moby,tklauser/docker,whuwxl/docker,sterchelen/docker,shishir-a412ed/docker,prertik/docker,dgageot/docker,shhsu/docker,naveed-jamil-tenpearls/moby,qudongfang/docker,coolljt0725/docker,containers/storage,mixja/docker,KingEmet/docker,gjaskiewicz/moby,pradipd/moby,xuxinkun/docker,HuKeping/docker,kencochrane/docker,dperny/docker,bearstech/moby,rhatdan/docker,ibuildthecloud/docker,mkumatag/docker,mtanlee/docker,asbjornenge/docker,trebonian/docker,thaJeztah/docker,Ramzec/docker,madhanrm/docker,shhsu/docker,sarnautov/moby,justincormack/docker,q384566678/docker,pramodhkp/moby,trebonian/docker,ffoysal/docker,13W/docker,darrenstahlmsft/moby,ajaymdesai/docker,jthelin/docker,unclejack/docker,JMesser81/docker,ndeloof/docker,justyntemme/docker,johnstep/moby-moby,djs55/docker,jlhawn/docker,hypriot/docker,mahak/docker,dmcgowan/docker,nawawi/docker,gnailuy/docker,jhorwit2/docker,x1022as/docker,crosbymichael/docker,sarnautov/moby,tagomoris/docker,yp-engineering/docker,tophj-ibm/docker,mtrmac/docker,moul/docker,yp-engineering/docker,erikstmartin/docker,asbjornenge/docker,kunalkushwaha/docker,13W/docker,michael-holzheu/docker,icaoweiwei/docker,lixiaobing10051267/docker,jvanz/docker,yasiramin10p/moby,zhuguihua/docker,laijs/moby,laijs/docker,sarnautov/moby,paralin/docker,kolyshkin/moby,harche/docker,mkumatag/docker,paralin/docker,mstanleyjones/docker,rancher/docker,harche/docker,dccurtis/docker,stevvooe/docker,tianon/docker,trebonian/docker,jwhonce/docker,michelvocks/docker,PatrickLang/moby,mixja/docker,KingEmet/docker,kojiromike/docker,afein/docker,portworx/docker,tophj-ibm/docker,justyntemme/docker,konstruktoid/docker-upstream,kolyshkin/docker,charleszheng44/moby,gnailuy/docker,raja-sami-10p/moby,tmp6154/docker,noironetworks/docker,13W/docker,konstruktoid/docker-upstream,moypray/docker,moypray/docker,tmp6154/docker,justincormack/docker,coreos/docker,yosifkit/docker,mohmost12/docker,ajaymdesai/docker,michael-holzheu/docker,naveed-jamil-tenpearls/moby,containers/storage,gnailuy/docker,containers/storage,rhatdan/storage,coolljt0725/docker,JMesser81/docker,Syntaxide/docker,dsau/docker,dsheets/moby,liaoqingwei/docker,nawawi/docker,mikebrow/docker,xiaods/docker,moypray/docker,mohmost12/docker,djs55/docker,bearstech/moby,mtesselH/docker,mtesselH/docker,Syntaxide/docker,HuKeping/docker,danyalKhaliq10p/moby,mike1729/docker,rhatdan/storage,miminar/docker,flavio/docker,mikebrow/docker,srust/docker,dongjoon-hyun/docker,erikh/docker,mtesselH/docker,projectatomic/docker,diogomonica/docker,jlebon/docker,moby/moby,gschaetz/moby,konstruktoid/docker-1,KarthikNayak/docker,abhinavdahiya/docker,scotttlin/docker,miminar/docker,mahak/docker,haveatry/docker,kolyshkin/docker,jameszhan/docker,laijs/moby,sterchelen/docker,johnstep/moby-moby,kojiromike/docker,stevvooe/docker,catinthesky/docker,jhorwit2/docker,AkihiroSuda/docker,Ramzec/docker,madhanrm/docker,mike1729/docker,srust/docker,qudongfang/docker,alfred-landrum/docker,SvenDowideit/docker,ndeloof/docker,zhuguihua/docker,prertik/docker,danyalKhaliq10p/moby,justyntemme/docker,nawawi/docker,mahak/docker,afein/docker,kojiromike/docker,twaugh/docker,jameszhan/docker,hqhq/moby,msabansal/docker,akira-baruah/docker,stevvooe/docker,mohmost12/docker,mstanleyjones/docker,tianon/docker,icaoweiwei/docker,sfsmithcha/docker,bonczj/moby-json-file-logger,qudongfang/docker,jlebon/docker,endophage/docker,brahmaroutu/docker,kolyshkin/moby,cloudflare/docker,laijs/moby,erikstmartin/docker,q384566678/docker,lixiaobing10051267/docker,HideoYamauchi/docker,shishir-a412ed/docker,amatsus/docker,michelvocks/docker,charleszheng44/moby,ripcurld0/moby,SvenDowideit/docker,darrenstahlmsft/docker,michelvocks/docker,diogomonica/docker,hqhq/moby,jhorwit2/docker