Ticket 518 - dse.ldif is 0 length after server kill or machine kill
Bug Description: If a machine is powered off while slapd is running, dse.ldif can have 0 bytes and
server doesn't start even if a dse.ldif.tmp or dse.ldif.bak exists
Fix Description: I see no way to prevent a 0 byte ldif in case of a machine crash from slapd code,
but the server should try all avaialble backup dse.ldif files to be able to start,
https://fedorahosted.org/389/ticket/518
Reviewed by: RichM (Thanks)