Sneaky change in the Renewal Threshold box interpretation

[pfpv]

I noticed that change yesterday, several days after upgrading ACME to 1.2. I am not sure when it changed, maybe on Jan 28, when 1.1 was released, because I see this in the change log: "Changed renewal calculation to be based on certificate lifetime."

Now the Renewal Threshold description says "Days of remaining lifetime at which ACME will renew the certificate." I had 80 in this field because previously, the field meaning was the age of the certificate before renewal. I saw no reason to renew certificates one month before they expire, so I set this field to 80 to give them a longer life.

I would like to suggest that, when a setting acquires an opposite meaning after an update, either use a new variable/setting for this or set the existing one to undefined.