pre1 dies on startup: generate_sql_clients() returned error

[Alan DeKok]

A.L.M.Buxey at lboro.ac.uk wrote:
> time for FAQ or Wiki entry? the error message is not too helpful
> but what it means is that you have an identical entry in your database.
> either its a duplicate, or its the same as one in clients.conf
> 
> the SQL table should have a UNIQUE force attribute for IP address

  The "clients.conf" file may also define clients.

  I'll add a debug message complaining about this.

  Alan DeKok.