GitLab

* Graceful handling of misconfigure password for dyn

If a bad password is given for provider "dyn" then the next
login attempt is at least 30minutes apart. This prevents an
account from being suspended.

Improve validation of flags for dyn provider. Add test for
ValidateConfig() and Config.String()

Also add --dyn-min-ttl option which sets the lower limit
of a record's TTL. Ignored if 0 (the default).

* docs: add graceful handling of misconfiguration to changelog