Add ability to use json structured logging format.
Add ability to use json structured logging format.

Signed-off-by: Eric Myhre <2346ad27d7568ba9896f1b7da6b5991251debdf2@exultant.us>

kolyshkin/runc,adrianreber/runc,sunyuan3/runc,shishir-a412ed/runc,cloudfoundry-incubator/runc,opencontainers/runc,mikebrow/runc,mYmNeo/runc,abduld/runc,kimh/runc,rajasec/runc,justincormack/runc,inatatsu/runc,liuwharton/runc,liuwharton/runc,ZJU-SEL/runc,kolyshkin/runc,kolyshkin/runc,rajasec/runc,wangkirin/runc,marcosnils/runc,crosbymichael/runc,albertoleal/runc,laijs/runc,cyphar/runc,mheon/runc,coolljt0725/runc,kimh/runc,WeiZhang555/runc,ZJU-SEL/runc,cloudfoundry-incubator/runc,justincormack/runc,estesp/runc,docker/runc,dqminh/runc,sunyuan3/runc,runcom/runc,jhowardmsft/runc,marcosnils/runc,nkwilson/runc,nkwilson/runc,nkwilson/runc,coolljt0725/runc,estesp/runc,fabiokung/runc,crosbymichael/runc,dqminh/runc,maxamillion/runc,mheon/runc,wangkirin/runc,xiaochenshen/runc,opencontainers/runc,hqhq/runc,fabiokung/runc,marcosnils/runc,maxamillion/runc,inatatsu/runc,mYmNeo/runc,adrianreber/runc,avagin/runc,abduld/runc,shishir-a412ed/runc,albertoleal/runc,WeiZhang555/runc,wking/runc,cyphar/runc,avagin/runc,wking/runc,docker/runc,WeiZhang555/runc,cyphar/runc,avagin/runc,stefanberger/runc,keloyang/runc,hqhq/runc,inatatsu/runc,adrianreber/runc,mikebrow/runc,justincormack/runc,kimh/runc,opencontainers/runc,estesp/runc,wking/runc,rajasec/runc,opencontainers/runc,ZJU-SEL/runc,dqminh/runc,hqhq/runc,rhatdan/runc,runcom/runc,cloudfoundry-incubator/runc,vbatts/runc,docker/runc,wangkirin/runc,crosbymichael/runc,keloyang/runc,mheon/runc,runcom/runc,jhowardmsft/runc,coolljt0725/runc,keloyang/runc,vbatts/runc,dqminh/runc,rhatdan/runc,albertoleal/runc,rhatdan/runc,laijs/runc,mikebrow/runc,xiaochenshen/runc,laijs/runc,fabiokung/runc,xiaochenshen/runc,liuwharton/runc,shishir-a412ed/runc,abduld/runc,mYmNeo/runc,rhatdan/runc,jhowardmsft/runc,sunyuan3/runc,stefanberger/runc,stefanberger/runc,maxamillion/runc,vbatts/runc,kolyshkin/runc