EXTRA_SETTINGS_FILE can be - for stdin
-c CERT_DIR In priority: this arg, $ACME_TINY_WRAPPER_CERT_DIR,
$HOME/webservercerts, if the other options aren't set.
EXTRA_SETTINGS_FILE can be - for stdin
-c CERT_DIR In priority: this arg, $ACME_TINY_WRAPPER_CERT_DIR,
$HOME/webservercerts, if the other options aren't set.