Ticket 49722 - Errors log full of " WARN - keys2idl - recieved NULL idl from index_read_ext_allids, treating as empty set" messages
Description: If searching on entrydn, and the value is not found return an empty
list instead of NULL. This prevent these harmless error messages in
Reviewed by: ?
(cherry picked from commit e350a268d6f7cbaaad35187f3774093b140bc42c)