Add bash completion for `docker stack`
Add bash completion for `docker stack`

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

tophj-ibm/docker,tmp6154/docker,scotttlin/docker,dccurtis/docker,nawawi/docker,thaJeztah/docker,yummypeng/docker,harche/docker,madhanrm/docker,HideoYamauchi/docker,kojiromike/docker,michael-holzheu/docker,mikedougherty/docker,mahak/docker,yongtang/docker,kolyshkin/moby,rancher/docker,diogomonica/docker,kolyshkin/moby,moul/docker,gjaskiewicz/moby,kolyshkin/moby,pradipd/moby,maxamillion/docker,johnstep/moby-moby,KarthikNayak/docker,jimjag/docker,lixiaobing1/docker,jlhawn/docker,laijs/moby,gnailuy/docker,xuxinkun/docker,docker/docker,mstanleyjones/docker,coreos/docker,yongtang/docker,thaJeztah/docker,darrenstahlmsft/moby,cpuguy83/docker,dsheets/moby,yosifkit/docker,kencochrane/docker,jimjag/docker,rhatdan/docker,moypray/docker,erikstmartin/docker,estesp/docker,ripcurld0/moby,Syntaxide/docker,jthelin/docker,michael-holzheu/docker,raja-sami-10p/moby,SvenDowideit/docker,resin-io/docker,PatrickLang/moby,ffoysal/docker,KarthikNayak/docker,Ramzec/docker,jlhawn/docker,mikedougherty/docker,sdurrheimer/docker,pradipd/moby,q384566678/docker,moul/docker,mtesselH/docker,flavio/docker,kolyshkin/docker,gschaetz/moby,yasiramin10p/moby,amatsus/docker,srust/docker,nawawi/docker,haveatry/docker,dgageot/docker,amatsus/docker,ndeloof/docker,crosbymichael/docker,thtanaka/docker,JMesser81/docker,harche/docker,akira-baruah/docker,ibuildthecloud/docker,johnstep/moby-moby,mixja/docker,qudongfang/docker,yummypeng/docker,estesp/docker,coolljt0725/docker,docker/docker,yosifkit/docker,lixiaobing10051267/docker,alfred-landrum/docker,mtesselH/docker,dsheets/moby,moby/moby,jwhonce/docker,laijs/docker,coreos/docker,mtesselH/docker,AkihiroSuda/docker,jlhawn/docker,miminar/docker,lixiaobing1/docker,nalind/docker,Syntaxide/docker,whuwxl/docker,liaoqingwei/docker,shishir-a412ed/docker,q384566678/docker,kojiromike/docker,flavio/docker,PatrickLang/moby,tmp6154/docker,imkin/moby,mkumatag/docker,djs55/docker,prertik/docker,ColinHebert/docker,allencloud/docker,mahak/docker,POLJM242/docker,flavio/docker,laijs/docker,qudongfang/docker,unclejack/docker,yasiramin10p/moby,erikstmartin/docker,jameszhan/docker,JMesser81/docker,jimjag/docker,rremer/moby,haveatry/docker,shishir-a412ed/docker,hqhq/moby,srust/docker,qudongfang/docker,naveed-jamil-tenpearls/moby,rhatdan/docker,tklauser/docker,harche/docker,AkihiroSuda/docker,mahak/docker,erikstmartin/docker,bonczj/moby-json-file-logger,bonczj/moby-json-file-logger,nawawi/docker,charleszheng44/moby,erikh/docker,PatrickLang/moby,jameszhan/docker,lixiaobing10051267/docker,justincormack/docker,raja-sami-10p/moby,madhanrm/docker,shishir-a412ed/docker,pradipd/moby,noironetworks/docker,allencloud/docker,trebonian/docker,jthelin/docker,mikebrow/docker,rancher/docker,tophj-ibm/docker,coolljt0725/docker,erikh/docker,kolyshkin/docker,allencloud/docker,trebonian/docker,sdurrheimer/docker,gnailuy/docker,tianon/docker,akira-baruah/docker,fcrisciani/docker,scotttlin/docker,johnstep/moby-moby,cyphar/docker,maxamillion/docker,duglin/docker,yasiramin10p/moby,naveed-jamil-tenpearls/moby,imkin/moby,darrenstahlmsft/docker,tmp6154/docker,mstanleyjones/docker,dims/docker,nalind/docker,trebonian/docker,noironetworks/docker,shhsu/docker,flavio/docker,Ramzec/docker,KingEmet/docker,noironetworks/docker,estesp/docker,ibuildthecloud/docker,tophj-ibm/moby,unclejack/docker,paralin/docker,bearstech/moby,jvanz/docker,srust/docker,rancher/docker,dperny/docker,konstruktoid/docker-1,crosbymichael/docker,sdurrheimer/docker,unclejack/docker,mikebrow/docker,pramodhkp/moby,liaoqingwei/docker,alfred-landrum/docker,Mokolea/docker,trebonian/docker,diogomonica/docker,dgageot/docker,ffoysal/docker,erikh/docker,rhatdan/docker,jwhonce/docker,rremer/moby,dims/docker,docker/docker,sarnautov/moby,x1022as/docker,Syntaxide/docker,moby/moby,mike1729/docker,tophj-ibm/docker,gjaskiewicz/moby,cyphar/docker,HideoYamauchi/docker,dmcgowan/docker,fcrisciani/docker,Ramzec/docker,KingEmet/docker,HideoYamauchi/docker,YuPengZTE/docker,yosifkit/docker,paralin/docker,coolljt0725/docker,imkin/moby,konstruktoid/docker-upstream,sterchelen/docker,charleszheng44/moby,cyphar/docker,haveatry/docker,gschaetz/moby,djs55/docker,konstruktoid/docker-1,madhanrm/docker,konstruktoid/docker-1,moby/moby,mixja/docker,jameszhan/docker,Ramzec/docker,SvenDowideit/docker,miminar/docker,catinthesky/docker,vdemeester/docker,maxamillion/docker,moypray/docker,konstruktoid/docker-upstream,thaJeztah/docker,ColinHebert/docker,kojiromike/docker,tonistiigi/docker,xuxinkun/docker,whuwxl/docker,cpuguy83/docker,djs55/docker,jwhonce/docker,KingEmet/docker,duglin/docker,dgageot/docker,xuxinkun/docker,jimjag/docker,YuPengZTE/docker,resin-io/docker,dccurtis/docker,hqhq/moby,mkumatag/docker,sterchelen/docker,tianon/docker,prertik/docker,crosbymichael/docker,x1022as/docker,sterchelen/docker,darrenstahlmsft/docker,kencochrane/docker,ibuildthecloud/docker,ripcurld0/moby,yosifkit/docker,paralin/docker,paralin/docker,darrenstahlmsft/docker,JMesser81/docker,bonczj/moby-json-file-logger,AkihiroSuda/docker,laijs/moby,ibuildthecloud/docker,whuwxl/docker,YuPengZTE/docker,ibuildthecloud/docker,ripcurld0/moby,hqhq/moby,x1022as/docker,dmcgowan/docker,gjaskiewicz/moby,konstruktoid/docker-upstream,liaoqingwei/docker,duglin/docker,scotttlin/docker,tklauser/docker,thtanaka/docker,dims/docker,cpuguy83/docker,mike1729/docker,michael-holzheu/docker,dccurtis/docker,kencochrane/docker,SvenDowideit/docker,gnailuy/docker,moul/docker,prertik/docker,tophj-ibm/moby,justincormack/docker,mahak/docker,pramodhkp/moby,raja-sami-10p/moby,laijs/moby,mstanleyjones/docker,gnailuy/docker,gschaetz/moby,Mokolea/docker,vdemeester/docker,fcrisciani/docker,Mokolea/docker,lixiaobing10051267/docker,moby/moby,yongtang/docker,mixja/docker,konstruktoid/docker-upstream,dsheets/moby,charleszheng44/moby,resin-io/docker,danyalKhaliq10p/moby,thtanaka/docker,sarnautov/moby,alfred-landrum/docker,diogomonica/docker,yummypeng/docker,tklauser/docker,bearstech/moby,thaJeztah/docker,tonistiigi/docker,ndeloof/docker,rremer/moby,ffoysal/docker,dmcgowan/docker,justincormack/docker,shhsu/docker,danyalKhaliq10p/moby,laijs/docker,darrenstahlmsft/moby,danyalKhaliq10p/moby,jvanz/docker,ndeloof/docker,coreos/docker,catinthesky/docker,q384566678/docker,darrenstahlmsft/moby,moul/docker,shhsu/docker,mkumatag/docker,Mokolea/docker,moypray/docker,jvanz/docker,ColinHebert/docker,amatsus/docker,KarthikNayak/docker,POLJM242/docker,dperny/docker,bearstech/moby,vdemeester/docker,nalind/docker,mikedougherty/docker,cpuguy83/docker,miminar/docker,mikebrow/docker,lixiaobing1/docker,naveed-jamil-tenpearls/moby,dperny/docker,pramodhkp/moby,sarnautov/moby,tophj-ibm/moby,nawawi/docker,catinthesky/docker,tonistiigi/docker,AkihiroSuda/docker,bearstech/moby,nalind/docker,mike1729/docker