cmd: Log warning if --resume and --config used together
cmd: Log warning if --resume and --config used together

There's nothing actually risky/dangerous in this situation, it's mostly
an attempt to get the user's attention

mholt/caddy,l3dlp/caddy,l3dlp/caddy,mholt/caddy,abiosoft/caddy,l3dlp/caddy,abiosoft/caddy