Fix maximum_lag_on_failover case when value set to 0

[garry-t]

• fix case when set 0 for maximum_lag_on_failover

[vitabaks]

Could you attach an example of the error that we are correcting?

I don't think anyone will set 0 as this will turn off autofailover at the slightest replication lag

[garry-t]

Could you attach an example of the error that we are correcting?

I don't think anyone will set 0 as this will turn off autofailover at the slightest replication lag

No errors, I just found that if I set 0, it ignores value and set default one. I dont know honestly if it reasonable to set 0 )), For me at least for now most important data integrity and if replication lag >0 I would prefer do not run failover.

[vitabaks]

In this case, just enable synchronous replication.