check control file is present, else warn use correct control file name open control file for writing
check control file is present, else warn
use correct control file name
open control file for writing

mozilla-it/duo_openvpn,limed/duo_openvpn,limed/duo_openvpn,gdestuynder/duo_openvpn-1,gdestuynder/duo_openvpn-1