(ITS#5079) Sourious warnings in slapd-bdb/hdb about missing objectClass at add

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: 2.3
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (81.72.89.40)
Submitted by: ando


When adding an entry rooted at "" to a back-bdb/hdb configured for the empty
suffix, warnings about the objectClass attribute being missing are issued
because a dummy root entry is checked for being an alias, a referral and so. 
This has already been fixed in HEAD long ago, but apparently, since no ITS was
opened, the fix was not backported to 2.3.  It is not a showstopper, but it
causes annoying spurious warnings to be logged.

p.