Check supplied hostname before using it.
Check supplied hostname before using it.

Docker-DCO-1.1-Signed-off-by: Rohit Jnagal <jnagal@google.com> (github: rjnagal)

sallyom/runc,meihuabo/runc,talwai/runc,balajibr/runc,jwuwork/runc,meihuabo/runc,rajasec/runc,clnperez/runc,rootfs/runc,zhangyancoder/libcontainer,balajibr/runc,willmtemple/runc,docker/runc,dqminh/runc,hqhq/runc,dqminh/runc,boucher/runc,mheon/runc,mrunalp/libcontainer,hxfeng/runc,whuwxl/libcontainer,aidanhs/runc,milosgajdos83/libcontainer-milosgajdos83,shakamunyi/libcontainer,avagin/libcontainer,runcom/runc,gitido/runc,WeiZhang555/runc,dqminh/libcontainer,BrickXu/libcontainer,runcom/runc,thaJeztah/libcontainer,jhowardmsft/runc,maxamillion/runc,dieface/runc,mheon/runc,mheon/libcontainer,Mashimiao/libcontainer,rootfs/runc,shakamunyi/libcontainer,abduld/runc,clnperez/runc,rhatdan/runc,xiaochenshen/runc,jhowardmsft/runc,coolljt0725/runc,navidshaikh/runc,markllama/runc,aidanhs/runc,albertoleal/runc,Mashimiao/libcontainer,thaJeztah/libcontainer,jhjeong-kr/runc,jhjeong-kr/runc,sunyuan3/runc,dieface/runc,fabiokung/runc,mrunalp/libcontainer,dieface/runc,kimh/runc,subuser-security/runc,LK4D4/runc,xiaochenshen/runc,lizf-os/runc,Microsoft/libcontainer,laijs/runc,WeiZhang555/runc,whosthatknocking/runc,mrunalp/runc,ycaihua/runc,keloyang/runc,cyphar/runc,ycaihua/libcontainer,han-wang/runc,mapk0y/runc,inatatsu/runc,navidshaikh/runc,sunyuan3/runc,HuKeping/runc,carlye566/runc,booyaa/runc,Mashimiao/libcontainer,fabiokung/runc,kolyshkin/runc,vbatts/runc,nkwilson/runc,justincormack/runc,kolyshkin/runc,runcom/libcontainer,liuwharton/runc,icecrime/libcontainer,LK4D4/runc,rhatdan/runc,zhangyancoder/libcontainer,subuser-security/runc,han-wang/runc,docker/runc,jwuwork/runc,dqminh/runc,cyphar/runc,rsampaio/runc,whuwxl/libcontainer,cloudfoundry-incubator/runc,shakamunyi/libcontainer,docker/libcontainer,meihuabo/runc,LTD-Beget/libcontainer,wking/runc,zhangyancoder/libcontainer,shenxiaochen/libcontainer,gwoo/runc,opencontainers/runc,unclejack/libcontainer,intfrr/runc,HardikDR/runc,LK4D4/runc,abduld/runc,w4ngyi/libcontainer,mYmNeo/runc,keloyang/libcontainer,estesp/runc,ddnbgroup/runc,tangkun75/libcontainer,wangkirin/runc,mapk0y/runc,ycaihua/runc,SaiedKazemi/libcontainer-criu,hqhq/libcontainer,opencontainers/runc,kolyshkin/runc,gitido/runc,runcom/libcontainer,shishir-a412ed/runc,dqminh/libcontainer,mikebrow/runc,shenxiaochen/libcontainer,adrianreber/runc,avagin/runc,unclejack/libcontainer,avagin/libcontainer,mrunalp/libcontainer,axsh/runc,avagin/runc,clnperez/runc,justincormack/runc,ChengTiesheng/runc,albertoleal/runc,BrickXu/libcontainer,crosbymichael/runc,jhowardmsft/runc,milosgajdos83/libcontainer-milosgajdos83,estesp/runc,hqhq/libcontainer,wking/runc,keloyang/libcontainer,mikebrow/runc,lizf-os/runc,lizf-os/runc,intfrr/runc,tangkun75/libcontainer,liuwharton/runc,YujiOshima/runc,intfrr/runc,hqhq/libcontainer,laijs/runc,stefanberger/runc,balajibr/runc,abduld/runc,unclejack/libcontainer,runcom/libcontainer,mrunalp/runc,cyphar/runc,SaiedKazemi/libcontainer-criu,han-wang/runc,sallyom/runc,boucher/runc,cxxly/runc,subuser-security/runc,kimh/runc,thaJeztah/libcontainer,nkwilson/runc,dqminh/libcontainer,mheon/runc,boucher/libcontainer,ekuric/runc,crosbymichael/libcontainer,albertoleal/runc,wcwxyz/runc,tangkun75/libcontainer,keloyang/libcontainer,rootfs/runc,hqhq/runc,willmtemple/runc,calavera/runc,ekuric/runc,w4ngyi/libcontainer,adrianreber/runc,BrickXu/libcontainer,wking/runc,estesp/libcontainer,mrunalp/runc,xiaochenshen/runc,ddnbgroup/runc,crosbymichael/libcontainer,fabiokung/runc,coolljt0725/runc,wcwxyz/runc,boucher/runc,axsh/runc,docker/libcontainer,wangkirin/runc,vbatts/runc,InformatiQ/runc,keloyang/libcontainer,ycaihua/runc,whosthatknocking/runc,ekuric/runc,mheon/libcontainer,hqhq/runc,wcwxyz/runc,crosbymichael/libcontainer,HardikDR/runc,mYmNeo/runc,wangkirin/runc,boucher/libcontainer,carlye566/runc,adrianreber/runc,opencontainers/runc,marcosnils/runc,ZJU-SEL/libcontainer,chenchun/runc,kimh/runc,w4ngyi/libcontainer,whosthatknocking/runc,keloyang/runc,calavera/runc,booyaa/runc,crosbymichael/runc,keloyang/runc,shenxiaochen/libcontainer,coolljt0725/runc,ZJU-SEL/runc,stefanberger/runc,sunyuan3/runc,rajasec/runc,zenlinTechnofreak/runc,sallyom/runc,hxfeng/runc,vbatts/runc,HuKeping/runc,kolyshkin/runc,haijunTan/runc,icecrime/libcontainer,ycaihua/libcontainer,zenlinTechnofreak/runc,SaiedKazemi/libcontainer-criu,mikebrow/runc,haijunTan/runc,jhjeong-kr/runc,booyaa/runc,WeiZhang555/runc,laijs/runc,ZJU-SEL/runc,rsampaio/runc,ZJU-SEL/runc,maxamillion/runc,chenchun/runc,markllama/runc,talwai/runc,dqminh/runc,runcom/runc,zenlinTechnofreak/runc,rhatdan/runc,stefanberger/runc,hxfeng/runc,cxxly/runc,InformatiQ/runc,cloudfoundry-incubator/runc,ZJU-SEL/libcontainer,ZJU-SEL/libcontainer,aidanhs/runc,willmtemple/runc,avagin/runc,LTD-Beget/libcontainer,docker/runc,carlye566/runc,HardikDR/runc,haijunTan/runc,chenchun/runc,crosbymichael/runc,calavera/runc,navidshaikh/runc,marcosnils/runc,YujiOshima/runc,estesp/libcontainer,axsh/runc,rhatdan/runc,avagin/libcontainer,ChengTiesheng/runc,liuwharton/runc,mheon/libcontainer,marcosnils/runc,HuKeping/runc,rajasec/runc,whuwxl/libcontainer,inatatsu/runc,InformatiQ/runc,rsampaio/runc,gitido/runc,icecrime/libcontainer,docker/libcontainer,boucher/libcontainer,talwai/runc,nkwilson/runc,maxamillion/runc,ChengTiesheng/runc,shishir-a412ed/runc,mapk0y/runc,estesp/libcontainer,Microsoft/libcontainer,mYmNeo/runc,rhatdan/libcontainer,jwuwork/runc,rhatdan/libcontainer,estesp/runc,ycaihua/libcontainer,YujiOshima/runc,cloudfoundry-incubator/runc,ddnbgroup/runc,Microsoft/libcontainer,opencontainers/runc,inatatsu/runc,LTD-Beget/libcontainer,shishir-a412ed/runc,rhatdan/libcontainer,cxxly/runc,markllama/runc,justincormack/runc