Lazy init useradd and remove init()
Lazy init useradd and remove init()

This should not have been in init() as it causes these lookups to happen
in all reexecs of the Docker binary. The only time it needs to be
resolved is when a user is added, which is extremely rare.

Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>

wenchma/docker,AkihiroSuda/docker,joeuo/docker.github.io,lixiaobing1/docker,mathewkoshy493/docker,shin-/docker.github.io,moxiegirl/docker,scotttlin/docker,justyntemme/docker,wenchma/docker,sean-jc/docker,yp-engineering/docker,brahmaroutu/docker,xuxinkun/docker,yasiramin10p/moby,willmtemple/docker,toli/docker,mtrmac/docker,diogomonica/docker,rillig/docker.github.io,mtanlee/docker,moxiegirl/docker,x1022as/docker,sanscontext/docker.github.io,Ramzec/docker,mikedougherty/docker,laijs/docker,PatrickLang/moby,gigidwan/docker,sterchelen/docker,achanda/docker,KingEmet/docker,KingEmet/docker,kojiromike/docker,gdevillele/docker.github.io,13W/docker,containers/storage,dims/docker,anujbahuguna/docker,nalind/docker,catinthesky/docker,TheBigBear/docker,stevvooe/docker,jzwlqx/denverdino.github.io,toli/docker,pyotr777/docker,sdurrheimer/docker,phiroict/docker,liaoqingwei/docker,tophj-ibm/docker,Morsicus/docker,tkopczynski/docker,nghiant2710/docker,sarnautov/moby,kolyshkin/docker,mike1729/docker,x1022as/docker,bdwill/docker.github.io,moypray/docker,jvanz/docker,mtanlee/docker,ffoysal/docker,AkihiroSuda/docker,jimjag/docker,rancher/docker,noironetworks/docker,michael-holzheu/docker,denverdino/docker.github.io,splunk/docker,twaugh/docker,michelvocks/docker,srust/docker,jzwlqx/denverdino.github.io,amatsus/docker,gdevillele/docker.github.io,tkopczynski/docker,allencloud/docker,Mashimiao/docker,haveatry/docker,14rcole/docker,mike1729/docker,paralin/docker,liaoqingwei/docker,justincormack/docker,moul/docker,KarthikNayak/docker,konstruktoid/docker-upstream,xuxinkun/docker,bdwill/docker.github.io,stainboy/docker,noironetworks/docker,miminar/docker,tklauser/docker,yosifkit/docker,cr7pt0gr4ph7/docker,rhatdan/storage,ibuildthecloud/docker,msabansal/docker,LaynePeng/docker,jlebon/docker,containers/storage,alexisbellido/docker.github.io,thaJeztah/docker.github.io,mohmost12/docker,jameszhan/docker,tonistiigi/docker,mtrmac/docker,danix800/docker.github.io,charleswhchan/docker,shin-/docker.github.io,q384566678/docker,madhanrm/docker,HuKeping/docker,phiroict/docker,londoncalling/docker.github.io,justyntemme/docker,LuisBosquez/docker.github.io,menglingwei/denverdino.github.io,sanjeo/docker,ColinHebert/docker,jongiddy/docker,hypriot/docker,tophj-ibm/moby,zhuguihua/docker,ndeloof/docker,vdemeester/docker,akira-baruah/docker,thaJeztah/docker,michael-holzheu/docker,gjaskiewicz/moby,BSWANG/denverdino.github.io,mstanleyjones/docker,whuwxl/docker,tonistiigi/docker,johnstep/moby-moby,Altiscale/docker,sfsmithcha/docker,cloudflare/docker,joaofnfernandes/docker.github.io,LuisBosquez/docker.github.io,joeuo/docker.github.io,nawawi/docker,BenHall/docker,dsau/docker,portworx/docker,miminar/docker,abhinavdahiya/docker,inatatsu/docker,cyphar/docker,bfirsh/docker,resin-io/docker,dongjoon-hyun/docker,prertik/docker,michael-holzheu/docker,crosbymichael/docker,rancher/docker,sanscontext/docker.github.io,phiroict/docker,michelvocks/docker,gdevillele/docker.github.io,erikh/docker,konstruktoid/docker-1,gjaskiewicz/moby,SvenDowideit/docker,bonczj/moby-json-file-logger,Microsoft/docker,willmtemple/docker,docker/docker,prertik/docker,moypray/docker,menglingwei/denverdino.github.io,dsheets/moby,joaofnfernandes/docker.github.io,sterchelen/docker,mtanlee/docker,icaoweiwei/docker,mahak/docker,mgoelzer/docker,thtanaka/docker,jwhonce/docker,isubuz/docker,kolyshkin/moby,qudongfang/docker,troy0820/docker.github.io,dnephin/docker,xiekeyang/docker,shhsu/docker,kolyshkin/moby,erikstmartin/docker,mahak/docker,anweiss/docker.github.io,eskaaren/docker,fcrisciani/docker,stainboy/docker,medallia/docker,denverdino/denverdino.github.io,xiekeyang/docker,JMesser81/docker,cpuguy83/docker,bluebreezecf/docker,scotttlin/docker,sheimi/docker,mathewkoshy493/docker,ffoysal/docker,dccurtis/docker,madhanrm/docker,allencloud/docker,mike1729/docker,anujbahuguna/docker,trebonian/docker,imkin/moby,cyphar/docker,jlhawn/docker,qudongfang/docker,darrenstahlmsft/docker,KingEmet/docker,dccurtis/docker,laijs/moby,estesp/docker,duglin/docker,rhatdan/docker,KarthikNayak/docker,rillig/docker.github.io,coolljt0725/docker,harche/docker,troy0820/docker.github.io,tophj-ibm/moby,moby/moby,xiaods/docker,Altiscale/docker,Shopify/docker,LaynePeng/docker,YuPengZTE/docker,SvenDowideit/docker,docker/docker.github.io,johnstep/docker.github.io,bearstech/moby,cpuguy83/docker,TheBigBear/docker,cpuguy83/docker,Tenk42/docker,denverdino/docker.github.io,resin-io/docker,docker/docker,paralin/docker,eskaaren/docker,wenchma/docker,dims/docker,ffoysal/docker,noxiouz/docker,msabansal/docker,ibuildthecloud/docker,stevvooe/docker,icaoweiwei/docker,yp-engineering/docker,BSWANG/denverdino.github.io,allencloud/docker,charleszheng44/moby,anweiss/docker.github.io,ndeloof/docker,jthelin/docker,JimGalasyn/docker.github.io,portworx/docker,jwhonce/docker,docker-zh/docker.github.io,coreos/docker,jlebon/docker,mstanleyjones/docker,tophj-ibm/docker,14rcole/docker,POLJM242/docker,dgageot/docker,HideoYamauchi/docker,stainboy/docker,ColinHebert/docker,Microsoft/docker,sdurrheimer/docker,harche/docker,moby/moby,denverdino/denverdino.github.io,Mokolea/docker,Syntaxide/docker,alexisbellido/docker.github.io,jlhawn/docker,trebonian/docker,trebonian/docker,maxamillion/docker,whuwxl/docker,nawawi/docker,coolljt0725/docker,kolyshkin/docker,maxamillion/docker,achanda/docker,shubheksha/docker.github.io,justincormack/docker,gnailuy/docker,denverdino/denverdino.github.io,Mashimiao/docker,runcom/docker,haveatry/docker,YuPengZTE/docker,konstruktoid/docker-upstream,yosifkit/docker,projectatomic/docker,containers/storage,phiroict/docker,sunyuan3/docker,kencochrane/docker,dperny/docker,anujbahuguna/docker,troy0820/docker.github.io,rremer/moby,johnstep/docker.github.io,cloudflare/docker,nalind/docker,shubheksha/docker.github.io,dsau/docker,lixiaobing1/docker,mtesselH/docker,yongtang/docker,alfred-landrum/docker,willmtemple/docker,jlhawn/docker,tklauser/docker,charleszheng44/moby,dperny/docker,fcrisciani/docker,flavio/docker,KarthikNayak/docker,rremer/moby,cpuguy83/docker,danyalKhaliq10p/moby,Morsicus/docker,erikstmartin/docker,xiekeyang/docker,dperny/docker,jhorwit2/docker,ibuildthecloud/docker,tmp6154/docker,akira-baruah/docker,prertik/docker,noxiouz/docker,thaJeztah/docker.github.io,kencochrane/docker,13W/docker,projectatomic/docker,hypriot/docker,cr7pt0gr4ph7/docker,thtanaka/docker,twaugh/docker,paralin/docker,johnstep/moby-moby,ajaymdesai/docker,thaJeztah/docker,gdevillele/docker.github.io,errordeveloper/docker,diogomonica/docker,dmcgowan/docker,gjaskiewicz/moby,duglin/docker,dongjoon-hyun/docker,BenHall/docker,sanscontext/docker.github.io,dgageot/docker,menglingwei/denverdino.github.io,bluebreezecf/docker,icaoweiwei/docker,HuKeping/docker,imkin/moby,charleswhchan/docker,dsau/docker,kerneltime/docker,moxiegirl/docker,moypray/docker,paralin/docker,ripcurld0/moby,asbjornenge/docker,lixiaobing10051267/docker,rillig/docker.github.io,denverdino/docker.github.io,danyalKhaliq10p/moby,troy0820/docker.github.io,achanda/docker,pradipd/moby,ColinHebert/docker,asbjornenge/docker,docker/docker.github.io,vdemeester/docker,thaJeztah/docker,aduermael/docker.github.io,Ramzec/docker,xiaods/docker,dsheets/moby,hqhq/moby,gigidwan/docker,inatatsu/docker,pradipd/moby,PatrickLang/moby,scotttlin/docker,JimGalasyn/docker.github.io,shishir-a412ed/docker,danix800/docker.github.io,mkumatag/docker,alexisbellido/docker.github.io,kerneltime/docker,jimjag/docker,ibuildthecloud/docker,johnstep/docker.github.io,flavio/docker,mixja/docker,Mokolea/docker,coreos/docker,pecameron/docker,mohmost12/docker,medallia/docker,sean-jc/docker,yasiramin10p/moby,mixja/docker,miminar/docker,moul/docker,djs55/docker,unclejack/docker,tagomoris/docker,JimGalasyn/docker.github.io,imkin/moby,zhuguihua/docker,darrenstahlmsft/moby,gigidwan/docker,LuisBosquez/docker.github.io,isubuz/docker,dmcgowan/docker,rhatdan/storage,endophage/docker,jameszhan/docker,qudongfang/docker,rhatdan/docker,docker/docker,TrumanLing/docker,jzwlqx/denverdino.github.io,raja-sami-10p/moby,charleszheng44/moby,phiroict/docker,maxamillion/docker,cyphar/docker,Shopify/docker,yosifkit/docker,dims/docker,michelvocks/docker,joeuo/docker.github.io,crosbymichael/docker,kunalkushwaha/docker,joaofnfernandes/docker.github.io,srust/docker,dgageot/docker,asbjornenge/docker,jongiddy/docker,lixiaobing1/docker,13W/docker,cr7pt0gr4ph7/docker,ripcurld0/moby,LuisBosquez/docker.github.io,thtanaka/docker,bdwill/docker.github.io,sfsmithcha/docker,alexisbellido/docker.github.io,Tenk42/docker,diogomonica/docker,SvenDowideit/docker,londoncalling/docker.github.io,AkihiroSuda/docker,johnstep/docker.github.io,13W/docker,jhorwit2/docker,rremer/moby,menglingwei/denverdino.github.io,gdevillele/docker.github.io,kunalkushwaha/docker,docker-zh/docker.github.io,justincormack/docker,bdwill/docker.github.io,bearstech/moby,catinthesky/docker,dsheets/moby,mikebrow/docker,toli/docker,estesp/docker,mikebrow/docker,POLJM242/docker,errordeveloper/docker,sarnautov/moby,unclejack/docker,pyotr777/docker,nghiant2710/docker,joaofnfernandes/docker.github.io,BenHall/docker,splunk/docker,medallia/docker,joeuo/docker.github.io,sarnautov/moby,medallia/docker,londoncalling/docker.github.io,tkopczynski/docker,liaoqingwei/docker,Ramzec/docker,hypriot/docker,naveed-jamil-tenpearls/moby,yummypeng/docker,sdurrheimer/docker,flavio/docker,dccurtis/docker,johnstep/docker.github.io,JimGalasyn/docker.github.io,erikh/docker,lixiaobing10051267/docker,sfsmithcha/docker,danix800/docker.github.io,anweiss/docker.github.io,mohmost12/docker,tophj-ibm/moby,laijs/docker,cloudflare/docker,menglingwei/denverdino.github.io,jlebon/docker,dongjoon-hyun/docker,sunyuan3/docker,HuKeping/docker,denverdino/docker.github.io,yummypeng/docker,gschaetz/moby,Mokolea/docker,aduermael/docker.github.io,x1022as/docker,gnailuy/docker,trebonian/docker,mikedougherty/docker,tophj-ibm/docker,coolljt0725/docker,shubheksha/docker.github.io,TrumanLing/docker,charleswhchan/docker,aduermael/docker.github.io,inatatsu/docker,danyalKhaliq10p/moby,jhorwit2/docker,sanjeo/docker,ajaymdesai/docker,ajaymdesai/docker,konstruktoid/docker-1,amatsus/docker,bfirsh/docker,amatsus/docker,joeuo/docker.github.io,runcom/docker,docker-zh/docker.github.io,sean-jc/docker,ripcurld0/moby,darrenstahlmsft/moby,johnstep/moby-moby,tianon/docker,13W/docker,brahmaroutu/docker,q384566678/docker,darrenstahlmsft/docker,mkumatag/docker,catinthesky/docker,mtesselH/docker,mikedougherty/docker,rhardih/docker,dnephin/docker,afein/docker,BSWANG/denverdino.github.io,abhinavdahiya/docker,jameszhan/docker,gschaetz/moby,mikebrow/docker,q384566678/docker,resin-io/docker,BSWANG/denverdino.github.io,tagomoris/docker,djs55/docker,mkumatag/docker,errordeveloper/docker,pecameron/docker,jimjag/docker,anweiss/docker.github.io,zhuguihua/docker,PatrickLang/moby,anweiss/docker.github.io,Ramzec/docker,thaJeztah/docker.github.io,bonczj/moby-json-file-logger,djs55/docker,nawawi/docker,raja-sami-10p/moby,stevvooe/docker,jthelin/docker,kojiromike/docker,gnailuy/docker,kencochrane/docker,HideoYamauchi/docker,brahmaroutu/docker,docker/docker.github.io,noxiouz/docker,nalind/docker,YuPengZTE/docker,shishir-a412ed/docker,rhatdan/docker,estesp/docker,HideoYamauchi/docker,LaynePeng/docker,noironetworks/docker,jvanz/docker,yongtang/docker,pramodhkp/moby,erikstmartin/docker,konstruktoid/docker-1,jzwlqx/denverdino.github.io,rhatdan/storage,moul/docker,moul/docker,tagomoris/docker,endophage/docker,hqhq/moby,docker-zh/docker.github.io,vdemeester/docker,gnailuy/docker,shin-/docker.github.io,Mashimiao/docker,laijs/moby,endophage/docker,sanscontext/docker.github.io,londoncalling/docker.github.io,yp-engineering/docker,sheimi/docker,dmcgowan/docker,Syntaxide/docker,shubheksha/docker.github.io,pecameron/docker,danix800/docker.github.io,nalind/docker,projectatomic/docker,pradipd/moby,isubuz/docker,bearstech/moby,shhsu/docker,shin-/docker.github.io,afein/docker,thaJeztah/docker,AkihiroSuda/docker,moby/moby,bearstech/moby,mahak/docker,docker/docker.github.io,alfred-landrum/docker,mathewkoshy493/docker,pramodhkp/moby,shhsu/docker,konstruktoid/docker-upstream,thaJeztah/docker.github.io,unclejack/docker,dnephin/docker,denverdino/docker.github.io,jongiddy/docker,mgoelzer/docker,haveatry/docker,tmp6154/docker,yasiramin10p/moby,lixiaobing10051267/docker,rillig/docker.github.io,denverdino/denverdino.github.io,splunk/docker,thaJeztah/docker.github.io,ndeloof/docker,harche/docker,mtesselH/docker,pyotr777/docker,Altiscale/docker,duglin/docker,mstanleyjones/docker,kolyshkin/moby,rhardih/docker,jzwlqx/denverdino.github.io,BSWANG/denverdino.github.io,Microsoft/docker,aduermael/docker.github.io,tianon/docker,jimjag/docker,shin-/docker.github.io,sanjeo/docker,xuxinkun/docker,raja-sami-10p/moby,sanscontext/docker.github.io,jwhonce/docker,erikh/docker,naveed-jamil-tenpearls/moby,sterchelen/docker,yongtang/docker,Mokolea/docker,Syntaxide/docker,kerneltime/docker,eskaaren/docker,docker-zh/docker.github.io,bluebreezecf/docker,hqhq/moby,Tenk42/docker,fcrisciani/docker,naveed-jamil-tenpearls/moby,mahak/docker,whuwxl/docker,crosbymichael/docker,bdwill/docker.github.io,LuisBosquez/docker.github.io,nawawi/docker,pramodhkp/moby,darrenstahlmsft/moby,DoraALin/docker,moby/moby,docker/docker.github.io,gschaetz/moby,mgoelzer/docker,JMesser81/docker,TheBigBear/docker,runcom/docker,yummypeng/docker,kojiromike/docker,konstruktoid/docker-upstream,kunalkushwaha/docker,twaugh/docker,shubheksha/docker.github.io,laijs/moby,bfirsh/docker,tklauser/docker,srust/docker,Morsicus/docker,alfred-landrum/docker,darrenstahlmsft/docker,yosifkit/docker,msabansal/docker,JMesser81/docker,londoncalling/docker.github.io,tonistiigi/docker,mixja/docker,tmp6154/docker,JimGalasyn/docker.github.io,joaofnfernandes/docker.github.io,xiaods/docker,abhinavdahiya/docker,rancher/docker,TrumanLing/docker,jvanz/docker,laijs/docker,justyntemme/docker,DoraALin/docker,portworx/docker,ibuildthecloud/docker,shishir-a412ed/docker,coreos/docker,afein/docker,mtrmac/docker,denverdino/denverdino.github.io,madhanrm/docker,sheimi/docker,sunyuan3/docker,Shopify/docker,flavio/docker,alexisbellido/docker.github.io,nghiant2710/docker,DoraALin/docker,bonczj/moby-json-file-logger