Move zsh completion logic to new subcommand: exec
Move zsh completion logic to new subcommand: exec

Signed-off-by: Steve Durrheimer <a2c1a055e5b399822be341b4e663de3cd05cf8f7@gmail.com>

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