merge branch 'pr-2232'
merge branch 'pr-2232'

Aleksa Sarai (1):
  libcontainer: dual-license nsenter/cloned_binary.c

LGTMs: 1ab352e9314c20d760dd168a2a849d6ab6d15b05@AkihiroSuda
Closes #2232

kolyshkin/runc,kolyshkin/runc,kolyshkin/runc,kolyshkin/runc,opencontainers/runc,xiaochenshen/runc,rhatdan/runc,xiaochenshen/runc,mikebrow/runc,opencontainers/runc,rhatdan/runc,dqminh/runc,dqminh/runc,estesp/runc,dqminh/runc,estesp/runc,rhatdan/runc,xiaochenshen/runc,mikebrow/runc,opencontainers/runc,rhatdan/runc,dqminh/runc,opencontainers/runc,estesp/runc,mikebrow/runc