Add -pid-file and -log CLI option.
Add -pid-file and -log CLI option.

Also don't exit if reload fails

rancherio/rancher-dns,rancherio/rancher-dns,vincent99/rancher-dns,dx9/rancher-dns,rancher/rancher-dns,vincent99/rancher-dns,dx9/rancher-dns,rancher/rancher-dns