fix addon manager failing to elect leader on masters with _ in the hostname (issue #88214)
fix addon manager failing to elect leader on masters with _ in the hostname (issue #88214)

coolsvap/kubernetes,fejta/kubernetes,ii/kubernetes,maciaszczykm/kubernetes,k82/kubernetes,tcnghia/kubernetes,ravilr/kubernetes,iterion/kubernetes,dereknex/kubernetes,liggitt/kubernetes,verult/kubernetes,tomzhang/kubernetes,jagosan/kubernetes,saad-ali/kubernetes,Lion-Wei/kubernetes,andrewrynhard/kubernetes,andrewrynhard/kubernetes,cblecker/kubernetes,csrwng/kubernetes,yarntime/kubernetes,stevesloka/kubernetes,jingxu97/kubernetes,k82/kubernetes,zhouhaibing089/kubernetes,carlory/kubernetes,ravisantoshgudimetla/kubernetes,soltysh/kubernetes,fanzhangio/kubernetes,humblec/kubernetes,linux-on-ibm-z/kubernetes,jdef/kubernetes,linux-on-ibm-z/kubernetes,MikeSpreitzer/kubernetes,gnufied/kubernetes,chrislovecnm/kubernetes,jdef/kubernetes,spzala/kubernetes,humblec/kubernetes,jagosan/kubernetes,mfojtik/kubernetes,matthyx/kubernetes,jsafrane/kubernetes,kubernetes/kubernetes,ravisantoshgudimetla/kubernetes,zetaab/kubernetes,luxas/kubernetes,brendandburns/kubernetes,johscheuer/kubernetes,kpgriffith/kubernetes,JacobTanenbaum/kubernetes,erwinvaneyk/kubernetes,micahhausler/kubernetes,saad-ali/kubernetes,MHBauer/kubernetes,joelsmith/kubernetes,feiskyer/kubernetes,x13n/kubernetes,monopole/kubernetes,monopole/kubernetes,tengqm/kubernetes,yarntime/kubernetes,xychu/kubernetes,chestack/kubernetes,tomerf/kubernetes,x13n/kubernetes,mosoft521/kubernetes,kubernetes/kubernetes,brendandburns/kubernetes,jingxu97/kubernetes,thockin/kubernetes,ixdy/kubernetes,wanghaoran1988/kubernetes,wanghaoran1988/kubernetes,mikedanese/kubernetes,Acidburn0zzz/kubernetes,zetaab/kubernetes,alejandroEsc/kubernetes,lojies/kubernetes,erwinvaneyk/kubernetes,mkumatag/kubernetes,jdef/kubernetes,MHBauer/kubernetes,PI-Victor/kubernetes,sanjeevm0/kubernetes,carlory/kubernetes,pwittrock/kubernetes,spzala/kubernetes,coolsvap/kubernetes,JacobTanenbaum/kubernetes,PI-Victor/kubernetes,nikhita/kubernetes,thockin/kubernetes,joelsmith/kubernetes,rafax/kubernetes,wanghaoran1988/kubernetes,maciaszczykm/kubernetes,chrislovecnm/kubernetes,andrewsykim/kubernetes,zhangmingld/kubernetes,andrewrynhard/kubernetes,kitt1987/kubernetes,k82/kubernetes,tengqm/kubernetes,nak3/kubernetes,olivierlemasle/kubernetes,huangjiuyuan/kubernetes,dims/kubernetes,jagosan/kubernetes,kevensen/kubernetes,ravilr/kubernetes,klaus1982/kubernetes,csrwng/kubernetes,humblec/kubernetes,idvoretskyi/kubernetes,kevensen/kubernetes,jessfraz/kubernetes,olivierlemasle/kubernetes,verb/kubernetes,Clarifai/kubernetes,gnufied/kubernetes,jagosan/kubernetes,gnufied/kubernetes,mYmNeo/kubernetes,MikeSpreitzer/kubernetes,wanghaoran1988/kubernetes,ingvagabund/kubernetes,carlory/kubernetes,mfojtik/kubernetes,warmchang/kubernetes,tengqm/kubernetes,erwinvaneyk/kubernetes,fgimenez/kubernetes,cmluciano/kubernetes,pwittrock/kubernetes,nckturner/kubernetes,BenTheElder/kubernetes,zetaab/kubernetes,humblec/kubernetes,PiotrProkop/kubernetes,nak3/kubernetes,kpgriffith/kubernetes,tpepper/kubernetes,csrwng/kubernetes,saad-ali/kubernetes,zhouhaibing089/kubernetes,PI-Victor/kubernetes,ii/kubernetes,maciaszczykm/kubernetes,mengqiy/kubernetes,yujuhong/kubernetes,yujuhong/kubernetes,weiwei04/kubernetes,micahhausler/kubernetes,krmayankk/kubernetes,zetaab/kubernetes,mYmNeo/kubernetes,sanjeevm0/kubernetes,chrislovecnm/kubernetes,tallclair/kubernetes,dixudx/kubernetes,tcnghia/kubernetes,soltysh/kubernetes,matthyx/kubernetes,chrislovecnm/kubernetes,ping035627/kubernetes,dlorenc/kubernetes,mfojtik/kubernetes,carlory/kubernetes,cblecker/kubernetes,tengqm/kubernetes,lojies/kubernetes,zhouhaibing089/kubernetes,monopole/kubernetes,kevensen/kubernetes,aledbf/kubernetes,chestack/kubernetes,saad-ali/kubernetes,sanjeevm0/kubernetes,rnaveiras/kubernetes,johscheuer/kubernetes,du2016/kubernetes,kevin-wangzefeng/kubernetes,JacobTanenbaum/kubernetes,mikedanese/kubernetes,MHBauer/kubernetes,sanjeevm0/kubernetes,k82cn/kubernetes,Lion-Wei/kubernetes,wongma7/kubernetes,kevensen/kubernetes,cofyc/kubernetes,matthyx/kubernetes,ravilr/kubernetes,huangjiuyuan/kubernetes,MikeSpreitzer/kubernetes,iameli/kubernetes,Clarifai/kubernetes,carlory/kubernetes,pires/kubernetes,feiskyer/kubernetes,mengqiy/kubernetes,jessfraz/kubernetes,PI-Victor/kubernetes,ravisantoshgudimetla/kubernetes,li-ang/kubernetes,jingxu97/kubernetes,brendandburns/kubernetes,stevesloka/kubernetes,mkumatag/kubernetes,enj/kubernetes,jsafrane/kubernetes,BenTheElder/kubernetes,k82cn/kubernetes,olivierlemasle/kubernetes,feiskyer/kubernetes,mkumatag/kubernetes,luxas/kubernetes,dereknex/kubernetes,PI-Victor/kubernetes,yujuhong/kubernetes,fejta/kubernetes,ravilr/kubernetes,joelsmith/kubernetes,chestack/kubernetes,liggitt/kubernetes,jessfraz/kubernetes,verb/kubernetes,krmayankk/kubernetes,zhouhaibing089/kubernetes,erwinvaneyk/kubernetes,fgimenez/kubernetes,x13n/kubernetes,weiwei04/kubernetes,nckturner/kubernetes,maciaszczykm/kubernetes,jagosan/kubernetes,csrwng/kubernetes,xlgao-zju/kubernetes,krmayankk/kubernetes,bparees/kubernetes,andrewsykim/kubernetes,jackfrancis/kubernetes,johscheuer/kubernetes,andrewrynhard/kube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