> Remove redundant nTime checks
>
> nTime is always initialized on deserialization or default-initialized
> with TIME_INIT, so special casing 0 does not make sense.
> Remove redundant nLastTry check
>
> All other places calculate "now - nLastTry", which is safe and correct
> to do when nLastTry is 0. So do the same here.
This is a backport of core#25303
Depends on D15088