(ITS#5227) old dsn acceptance

[aej@wpi.edu]

Full_Name: Allan E. Johannesen
Version: 2.4.6
OS: Linux EL 4
URL: http://users.wpi.edu/~aej/schema_init.diff
Submission from: (NULL) (130.215.24.208)


Old CSN stamps are not accepted by 2.4.6.  I guess they must be _very_ old,
since there is a "2/3" CSN conversion in the release.

The stamps are of the form: YYYYMMDDHH:MM:SSZ

Perhaps I'm the only person in the OpenLDAP universe who might see this problem,
but I adapted the 2/3 conversion for these old fields.