Name: plaintextloginpause
Type: DURATION
Default-Value: NULL
Last-Modified: 3.1.8

Time to pause after a successful plaintext login.  For systems that support
strong authentication, this permits users to perceive a cost of using
plaintext passwords.  (This does not affect the use of PLAIN in SASL
authentications.)

For backward compatibility, if no unit is specified, seconds is assumed.
