Make it clear that env vars must be simple
Make it clear that env vars must be simple

Closes #20169

Signed-off-by: Doug Davis <ff3bde741799c0eff815b83a54eda3fc494df54f@us.ibm.com>

anujbahuguna/docker,tophj-ibm/moby,amatsus/docker,jameszhan/docker,noironetworks/docker,jthelin/docker,Mashimiao/docker,moxiegirl/docker,HuKeping/docker,miminar/docker,dgageot/docker,splunk/docker,scollier/docker,eskaaren/docker,YujiOshima/docker,crosbymichael/docker,unclejack/docker,endophage/docker,alfred-landrum/docker,q384566678/docker,tagomoris/docker,luxas/docker,mixja/docker,dmcgowan/docker,bonczj/moby-json-file-logger,HideoYamauchi/docker,kerneltime/docker,konstruktoid/docker-upstream,kojiromike/docker,londoncalling/docker.github.io,justyntemme/docker,rillig/docker.github.io,anweiss/docker.github.io,rillig/docker.github.io,13W/docker,Mashimiao/docker,Shopify/docker,erikh/docker,hustcat/docker,laijs/moby,shubheksha/docker.github.io,inatatsu/docker,xuxinkun/docker,sdurrheimer/docker,londoncalling/docker.github.io,bfirsh/docker,ffoysal/docker,erikstmartin/docker,estesp/docker,vijaykilari/docker,kerneltime/docker,scollier/docker,moul/docker,tianon/docker,rremer/moby,yasiramin10p/moby,raja-sami-10p/moby,denverdino/denverdino.github.io,allencloud/docker,justincormack/docker,denverdino/docker.github.io,michael-holzheu/docker,jzwlqx/denverdino.github.io,dnephin/docker,13W/docker,x1022as/docker,gnailuy/docker,joeuo/docker.github.io,hypriot/docker,londoncalling/docker.github.io,resin-io/docker,tklauser/docker,jzwlqx/denverdino.github.io,diogomonica/docker,Mokolea/docker,srust/docker,ColinHebert/docker,mgoelzer/docker,medallia/docker,LuisBosquez/docker.github.io,rhatdan/docker,afein/docker,sanjeo/docker,nalind/docker,dperny/docker,rhatdan/storage,asbjornenge/docker,jlhawn/docker,menglingwei/denverdino.github.io,tophj-ibm/moby,jimjag/docker,shubheksha/docker.github.io,moxiegirl/docker,HackToday/docker,nawawi/docker,cpuguy83/docker,solganik/docker,PatrickLang/moby,danix800/docker.github.io,ajaymdesai/docker,rhardih/docker,mahak/docker,joaofnfernandes/docker.github.io,upmio/docker,danix800/docker.github.io,erikstmartin/docker,maxamillion/docker,dongjoon-hyun/docker,duglin/docker,thaJeztah/docker.github.io,liaoqingwei/docker,OnePaaS/docker,geekylucas/docker,ndeloof/docker,tmp6154/docker,konstruktoid/docker-upstream,moul/docker,thaJeztah/docker.github.io,moby/moby,shishir-a412ed/docker,johnstep/docker.github.io,srust/docker,BSWANG/denverdino.github.io,endophage/docker,alexisbellido/docker.github.io,msabansal/docker,projectatomic/docker,dsau/docker,menglingwei/denverdino.github.io,moby/moby,alexisbellido/docker.github.io,dims/docker,icecrime/docker,hqhq/moby,menglingwei/denverdino.github.io,shishir-a412ed/docker,JimGalasyn/docker.github.io,Morsicus/docker,solganik/docker,gschaetz/moby,yummypeng/docker,laijs/docker,13W/docker,Altiscale/docker,sallyom/docker,JMesser81/docker,sheimi/docker,zhuguihua/docker,jwhonce/docker,tkopczynski/docker,davinashreddy/docker,phiroict/docker,mikebrow/docker,denverdino/docker.github.io,denverdino/denverdino.github.io,mstanleyjones/docker,resin-io/docker,sanjeo/docker,Syntaxide/docker,konstruktoid/docker-1,projectatomic/docker,msabansal/docker,londoncalling/docker.github.io,mike1729/docker,prertik/docker,thtanaka/docker,mike1729/docker,jzwlqx/denverdino.github.io,containers/storage,michael-holzheu/docker,thaJeztah/docker,moul/docker,jc-m/docker,dmcgowan/docker,michelvocks/docker,naveed-jamil-tenpearls/moby,bfirsh/docker,docker-zh/docker.github.io,mikebrow/docker,mathewkoshy493/docker,fcrisciani/docker,ColinHebert/docker,solganik/docker,johnstep/moby-moby,konstruktoid/docker-upstream,Mokolea/docker,mikebrow/docker,yp-engineering/docker,tklauser/docker,ailispaw/docker,mahak/docker,noxiouz/docker,sunyuan3/docker,isubuz/docker,upmio/docker,liaoqingwei/docker,zhangjianfnst/docker,achanda/docker,ColinHebert/docker,pyotr777/docker,joaofnfernandes/docker.github.io,tkopczynski/docker,moby/moby,jlhawn/docker,zhuguihua/docker,anweiss/docker.github.io,dccurtis/docker,dsau/docker,errordeveloper/docker,nguyentm83/docker,joaofnfernandes/docker.github.io,xiekeyang/docker,jzwlqx/denverdino.github.io,phiroict/docker,icecrime/docker,ivansaracino/docker,POLJM242/docker,willmtemple/docker,thaJeztah/docker.github.io,alexisbellido/docker.github.io,charleszheng44/moby,gao-feng/docker,yosifkit/docker,moby/moby,LaynePeng/docker,konstruktoid/docker-1,yummypeng/docker,Morsicus/docker,umerazad/docker,JimGalasyn/docker.github.io,eskaaren/docker,gdevillele/docker.github.io,djs55/docker,anortef/docker,ripcurld0/moby,xiaods/docker,asbjornenge/docker,HuKeping/docker,crosbymichael/docker,zhangjianfnst/docker,harche/docker,jecarey/docker,nawawi/docker,yp-engineering/docker,YuPengZTE/docker,TheBigBear/docker,ckeyer/docker,BSWANG/denverdino.github.io,ajaymdesai/docker,sunyuan3/docker,jc-m/docker,yummypeng/docker,pramodhkp/moby,pecameron/docker,izarov/docker,bfirsh/docker,flavio/docker,cloudflare/docker,shhsu/docker,jhorwit2/docker,contiv/docker,ailispaw/docker,phiroict/docker,gdevillele/docker.github.io,cpuguy83/docker,rkazak/docker,stevvooe/docker,ZJU-SEL/docker,AkihiroSuda/docker,gschaetz/moby,abhinavdahiya/docker,whuwxl/docker,PatrickLang/moby,darrenstahlmsft/moby,rancher/docker,KingEmet/docker,docker-zh/docker.github.io,twaugh/docker,dongjoon-hyun/docker,sean-jc/docker,miminar/docker,docker-zh/docker.github.io,ibuildthecloud/docker,sean-jc/docker,nalind/docker,joeuo/docker.github.io,sheimi/docker,vijaykilari/docker,troy0820/docker.github.io,nawawi/docker,dsheets/moby,coolljt0725/docker,shubheksha/docker.github.io,LaynePeng/docker,abhinavdahiya/docker,cnaize/docker,jc-m/docker,yongtang/docker,jvanz/docker,jongiddy/docker,hustcat/docker,ajaymdesai/docker,mixja/docker,miminar/docker,rillig/docker.github.io,wenchma/docker,sheimi/docker,cr7pt0gr4ph7/docker,sfsmithcha/docker,madhanrm/docker,Microsoft/docker,aidanhs/docker,noxiouz/docker,jimjag/docker,icaoweiwei/docker,sterchelen/docker,rremer/moby,anortef/docker,cyli/docker,haveatry/docker,izarov/docker,yp-engineering/docker,mohmost12/docker,denverdino/denverdino.github.io,abhinavdahiya/docker,TheBigBear/docker,stainboy/docker,joeuo/docker.github.io,menglingwei/denverdino.github.io,jzwlqx/denverdino.github.io,Mokolea/docker,stainboy/docker,jlhawn/docker,yongtang/docker,wenchma/docker,hqhq/moby,trebonian/docker,anujbahuguna/docker,naveed-jamil-tenpearls/moby,mtanlee/docker,sanscontext/docker.github.io,stainboy/docker,laijs/docker,errordeveloper/docker,afein/docker,darrenstahlmsft/docker,kunalkushwaha/docker,tmp6154/docker,HackToday/docker,charleswhchan/docker,anweiss/docker.github.io,izarov/docker,sterchelen/docker,TheBigBear/docker,imkin/moby,kolyshkin/moby,whuwxl/docker,YujiOshima/docker,bonczj/moby-json-file-logger,afein/docker,ZJUshuaizhou/docker,medallia/docker,shubheksha/docker.github.io,cyphar/docker,Tenk42/docker,danyalKhaliq10p/moby,cnaize/docker,tophj-ibm/docker,tpounds/docker,toli/docker,johnstep/moby-moby,dnephin/docker,bluebreezecf/docker,gdevillele/docker.github.io,mtesselH/docker,dperny/docker,jwhonce/docker,mstanleyjones/docker,toli/docker,twaugh/docker,charleszheng44/moby,LaynePeng/docker,rkazak/docker,sarnautov/moby,thtanaka/docker,aduermael/docker.github.io,bearstech/moby,rhardih/docker,BSWANG/denverdino.github.io,bearstech/moby,ailispaw/docker,joeuo/docker.github.io,scotttlin/docker,catinthesky/docker,flavio/docker,Ramzec/docker,runcom/docker,danyalKhaliq10p/moby,lixiaobing1/docker,umerazad/docker,jvanz/docker,ibuildthecloud/docker,Tenk42/docker,pradipd/moby,maxamillion/docker,bluebreezecf/docker,lixiaobing10051267/docker,tagomoris/docker,vdemeester/docker,xuxinkun/docker,mohmost12/docker,aduermael/docker.github.io,madhanrm/docker,srust/docker,shin-/docker.github.io,HideoYamauchi/docker,dsau/docker,rancher/docker,cr7pt0gr4ph7/docker,geekylucas/docker,docker/docker,upmio/docker,aduermael/docker.github.io,bearstech/moby,joaofnfernandes/docker.github.io,duglin/docker,maxamillion/docker,ZJUshuaizhou/docker,nghiant2710/docker,rhatdan/docker,paralin/docker,willmtemple/docker,sfsmithcha/docker,tpounds/docker,gnailuy/docker,icaoweiwei/docker,catinthesky/docker,anweiss/docker.github.io,rhatdan/storage,sanscontext/docker.github.io,aidanhs/docker,ripcurld0/moby,kolyshkin/moby,BenHall/docker,POLJM242/docker,mixja/docker,xiaods/docker,toli/docker,geekylucas/docker,vdemeester/docker,Ramzec/docker,harche/docker,achanda/docker,jwhonce/docker,Ramzec/docker,alfred-landrum/docker,tkopczynski/docker,prertik/docker,whuwxl/docker,troy0820/docker.github.io,cpuguy83/docker,mtesselH/docker,splunk/docker,tklauser/docker,fsoppelsa/docker,tonistiigi/docker,msabansal/docker,akira-baruah/docker,ripcurld0/moby,Microsoft/docker,JMesser81/docker,konstruktoid/docker-1,unclejack/docker,x1022as/docker,kojiromike/docker,kerneltime/docker,Syntaxide/docker,imkin/moby,projectatomic/docker,harche/docker,bdwill/docker.github.io,ZJUshuaizhou/docker,achanda/docker,moul/docker,zhuguihua/docker,estesp/docker,mtanlee/docker,bdwill/docker.github.io,erikh/docker,davinashreddy/docker,jongiddy/docker,hqhq/moby,HackToday/docker,diogomonica/docker,gigidwan/docker,trebonian/docker,paralin/docker,pradipd/moby,sanjeo/docker,raja-sami-10p/moby,yosifkit/docker,kolyshkin/docker,charleswhchan/docker,mohmost12/docker,zhangjianfnst/docker,q384566678/docker,fsoppelsa/docker,fcrisciani/docker,flavio/docker,stevvooe/docker,gnailuy/docker,docker/docker.github.io,dgageot/docker,mtesselH/docker,mikedougherty/docker,JMesser81/docker,endophage/docker,14rcole/docker,contiv/docker,LuisBosquez/docker.github.io,ZJU-SEL/docker,YuPengZTE/docker,noironetworks/docker,haveatry/docker,jlebon/docker,akira-baruah/docker,darrenstahlmsft/moby,tophj-ibm/docker,cr7pt0gr4ph7/docker,troy0820/docker.github.io,Tenk42/docker,inatatsu/docker,ivansaracino/docker,gdevillele/docker.github.io,runcom/docker,nawawi/docker,shubheksha/docker.github.io,troy0820/docker.github.io,Mashimiao/docker,yosifkit/docker,shin-/docker.github.io,Shopify/docker,mgoelzer/docker,liaoqingwei/docker,splunk/docker,jimjag/docker,Altiscale/docker,Microsoft/docker,sdurrheimer/docker,amatsus/docker,johnstep/moby-moby,tonistiigi/docker,sanscontext/docker.github.io,DoraALin/docker,dperny/docker,Syntaxide/docker,HideoYamauchi/docker,bonczj/moby-json-file-logger,13W/docker,tmp6154/docker,OnePaaS/docker,contiv/docker,LuisBosquez/docker.github.io,coreos/docker,BenHall/docker,cmehay/docker-1,dims/docker,justyntemme/docker,brahmaroutu/docker,jthelin/docker,coolljt0725/docker,x1022as/docker,ffoysal/docker,thaJeztah/docker.github.io,docker-zh/docker.github.io,kunalkushwaha/docker,xiaods/docker,ibuildthecloud/docker,fsoppelsa/docker,containers/storage,LuisBosquez/docker.github.io,jhorwit2/docker,tonistiigi/docker,mkumatag/docker,xiekeyang/docker,aduermael/docker.github.io,alfred-landrum/docker,gao-feng/docker,unclejack/docker,coreos/docker,willmtemple/docker,moxiegirl/docker,sanscontext/docker.github.io,dongjoon-hyun/docker,menglingwei/denverdino.github.io,crosbymichael/docker,docker/docker.github.io,thtanaka/docker,luxas/docker,bdwill/docker.github.io,yasiramin10p/moby,shhsu/docker,gigidwan/docker,cyli/docker,SvenDowideit/docker,scotttlin/docker,xiekeyang/docker,DoraALin/docker,allencloud/docker,tophj-ibm/moby,rremer/moby,q384566678/docker,mtrmac/docker,mtrmac/docker,mikedougherty/docker,pramodhkp/moby,bdwill/docker.github.io,londoncalling/docker.github.io,johnstep/docker.github.io,moypray/docker,cmehay/docker-1,anweiss/docker.github.io,pyotr777/docker,sfsmithcha/docker,darrenstahlmsft/docker,mike1729/docker,gjaskiewicz/moby,hustcat/docker,pecameron/docker,konstruktoid/docker-upstream,portworx/docker,sunyuan3/docker,xuxinkun/docker,gjaskiewicz/moby,dsheets/moby,nguyentm83/docker,michelvocks/docker,PatrickLang/moby,djs55/docker,cmehay/docker-1,shishir-a412ed/docker,rancher/docker,jameszhan/docker,gjaskiewicz/moby,justincormack/docker,imkin/moby,flavio/docker,tianon/docker,michelvocks/docker,ndeloof/docker,jecarey/docker,JimGalasyn/docker.github.io,SvenDowideit/docker,sarnautov/moby,ndeloof/docker,mgoelzer/docker,containers/storage,paralin/docker,nghiant2710/docker,JimGalasyn/docker.github.io,BenHall/docker,raja-sami-10p/moby,anortef/docker,phiroict/docker,cloudflare/docker,TrumanLing/docker,moypray/docker,djs55/docker,rillig/docker.github.io,ffoysal/docker,brahmaroutu/docker,dnephin/docker,sallyom/docker,jongiddy/docker,gdevillele/docker.github.io,rhatdan/storage,gao-feng/docker,vijaykilari/docker,alexisbellido/docker.github.io,amatsus/docker,dsheets/moby,thaJeztah/docker.github.io,jameszhan/docker,cyphar/docker,portworx/docker,13W/docker,rkazak/docker,erikstmartin/docker,mahak/docker,ibuildthecloud/docker,denverdino/docker.github.io,YuPengZTE/docker,pradipd/moby,coreos/docker,medallia/docker,errordeveloper/docker,pecameron/docker,resin-io/docker,denverdino/docker.github.io,KingEmet/docker,YujiOshima/docker,dims/docker,JimGalasyn/docker.github.io,mikedougherty/docker,diogomonica/docker,thaJeztah/docker,twaugh/docker,kolyshkin/docker,cyli/docker,AkihiroSuda/docker,eskaaren/docker,gigidwan/docker,dccurtis/docker,vdemeester/docker,charleswhchan/docker,KarthikNayak/docker,gnailuy/docker,mkumatag/docker,denverdino/denverdino.github.io,lixiaobing1/docker,umerazad/docker,jvanz/docker,kunalkushwaha/docker,estesp/docker,kolyshkin/moby,isubuz/docker,lixiaobing10051267/docker,anujbahuguna/docker,cyphar/docker,asbjornenge/docker,cloudflare/docker,shhsu/docker,pyotr777/docker,lixiaobing10051267/docker,kencochrane/docker,scotttlin/docker,coolljt0725/docker,allencloud/docker,darrenstahlmsft/docker,sterchelen/docker,AkihiroSuda/docker,nghiant2710/docker,BSWANG/denverdino.github.io,jhorwit2/docker,lixiaobing1/docker,catinthesky/docker,sanscontext/docker.github.io,cnaize/docker,denverdino/denverdino.github.io,SvenDowideit/docker,TrumanLing/docker,laijs/docker,trebonian/docker,prertik/docker,noxiouz/docker,danix800/docker.github.io,BSWANG/denverdino.github.io,icaoweiwei/docker,tophj-ibm/docker,docker/docker.github.io,Ramzec/docker,icecrime/docker,pramodhkp/moby,qudongfang/docker,shin-/docker.github.io,kojiromike/docker,duglin/docker,ivansaracino/docker,gschaetz/moby,yasiramin10p/moby,bdwill/docker.github.io,tagomoris/docker,darrenstahlmsft/moby,johnstep/docker.github.io,AkihiroSuda/docker,joaofnfernandes/docker.github.io,jlebon/docker,qudongfang/docker,moypray/docker,bluebreezecf/docker,hypriot/docker,nalind/docker,phiroict/docker,docker/docker.github.io,justincormack/docker,mathewkoshy493/docker,naveed-jamil-tenpearls/moby,medallia/docker,thaJeztah/docker,ckeyer/docker,charleszheng44/moby,brahmaroutu/docker,johnstep/docker.github.io,noironetworks/docker,dmcgowan/docker,isubuz/docker,haveatry/docker,mstanleyjones/docker,ckeyer/docker,denverdino/docker.github.io,dgageot/docker,qudongfang/docker,bearstech/moby,OnePaaS/docker,sdurrheimer/docker,TrumanLing/docker,yongtang/docker,14rcole/docker,yosifkit/docker,docker/docker,sarnautov/moby,docker/docker,HuKeping/docker,justyntemme/docker,inatatsu/docker,tpounds/docker,cpuguy83/docker,aidanhs/docker,laijs/moby,kencochrane/docker,shin-/docker.github.io,sean-jc/docker,KarthikNayak/docker,mtrmac/docker,joeuo/docker.github.io,LuisBosquez/docker.github.io,kencochrane/docker,stevvooe/docker,Altiscale/docker,paralin/docker,fcrisciani/docker,davinashreddy/docker,danix800/docker.github.io,jlebon/docker,Mokolea/docker,portworx/docker,sallyom/docker,KarthikNayak/docker,docker-zh/docker.github.io,KingEmet/docker,mtanlee/docker,rhatdan/docker,luxas/docker,mkumatag/docker,DoraALin/docker,ibuildthecloud/docker,trebonian/docker,johnstep/docker.github.io,hypriot/docker,mahak/docker,erikh/docker,alexisbellido/docker.github.io,shin-/docker.github.io,wenchma/docker,docker/docker.github.io,Morsicus/docker,michael-holzheu/docker,mathewkoshy493/docker,runcom/docker,danyalKhaliq10p/moby,jimjag/docker,madhanrm/docker,thaJeztah/docker,nalind/docker,Shopify/docker,laijs/moby,dccurtis/docker