Fix provided by grapvar@gmail.com

Ding Fei authored Dec 04, 2020 and Quanah Gibson-Mount committed Dec 08, 2020

`rc` collects exit status all the way down but is not used at all? If `code`
comparison at exit is intended then there exists some path that leaves it in
garbage value, say when `ldap_whoami` or `ldap_cancel` fails.

Howard Chu authored Nov 23, 2020 and Quanah Gibson-Mount committed Dec 02, 2020

Tighten validity checks

Howard Chu authored Nov 23, 2020 and Quanah Gibson-Mount committed Dec 02, 2020

Regression from fix for ITS#7403