variable exitcode is not been cleaned before every domain validation

[rafael747]

docker-flow-letsencrypt/certbot.sh

Lines 41 to 46 in 68747ea

	let exitcode=tries=0
	until [ $tries -ge $MAXRETRIES ]
	do
	tries=$[$tries+1]
	certbot-auto certonly --dry-run "${args[@]}" -d "$i" | grep -q 'The dry run was successful.' && break
	exitcode=$?

This way, after a initial failure of domain validation, the exitcode variable are only redefined when the validation fails again. If the validation succeeds, the exitcode remains with the value of previous iteration because the "break" statement.

This cause the domain to not be included in the certificate generation.

To work correctly, the exitcode variable needs to be cleaned before every domain validation trial