Use "auth-retry nointeract" to prevent OpenVPN clients from exiting or attempting to prompt for passwords
We should use
auth-retry nointeract to prevent OpenVPN clients from exiting or attempting to prompt for passwords, since we run the clients non-interactively, the directive fits our use case.
It may need to be an option (deafults on) since some people may have to disable the feature so they don't run afoul of failed login attempt limits. More often the case is temporary authentication failures which this helps work around.
Change OpenVPN to retry client auth when it fails by default, rather than making the process exit which confuses users. Fixes #7506