Setting max-cache-ttl to 0 does not disable caching

[Lucas Mulling]

Hello,

A few users have questioned a change in behaviour from version 2.4.7 to
2.5.0 (commit 92de0387f04b1e87a4a49ed063323624f25ac3ef) where setting
max-cache-ttl to 0 does not disable password caching anymore, is this
change intended?

See discussion here: https://bugzilla.suse.com/show_bug.cgi?id=1241656

Thank you,
Lucas Mülling