Add service_name support (provides support for systemd on el7 and archlinux).
Add service_name support (provides support for systemd on el7 and archlinux).

chrisduong/openvpn,chrisduong/openvpn,xhost-cookbooks/openvpn,ai-traders/openvpn,xhost-cookbooks/openvpn,ForeverOceans/openvpn,POSpulse/openvpn,xhost-cookbooks/openvpn,zackp30/openvpn,zackp30/openvpn,ForeverOceans/openvpn,chrisduong/openvpn,ai-traders/openvpn,zackp30/openvpn,POSpulse/openvpn,ForeverOceans/openvpn,POSpulse/openvpn,ai-traders/openvpn