If we know a file must be an argument, error during option processing if it's not a readable file. We have this with OP_FROM_FILE for files that we open and process ourselves, but there are other files we don't open during argument processing (for instance --tls-key/--tls-cert/--tls-chain)
If we know a file must be an argument, error during option processing if it's not a readable file. We have this with OP_FROM_FILE for files that we open and process ourselves, but there are other files we don't open during argument processing (for instance --tls-key/--tls-cert/--tls-chain)