(ITS#6245) back-config allows empty add operation

[quanah@zimbra.com]

Full_Name: Quanah Gibson-Mount
Version: 2.4.17
OS: Linux 2.6
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (75.111.29.239)


[zimbra@freelancer ~]$ ldapmodify -x -H ldapi:/// -D cn=config -W
Enter LDAP Password:
dn: olcDatabase={2}hdb,cn=config
changetype:modify
add:

modifying entry "olcDatabase={2}hdb,cn=config"

dn: olcDatabase={2}hdb,cn=config
changetype:modify
add:

modifying entry "olcDatabase={2}hdb,cn=config"



Log shows it happening, too:
Aug  8 15:08:50 freelancer slapd[1937]: conn=16 fd=23 ACCEPT from
PATH=/opt/zimbra/openldap-2.4.17.8z/var/run/ldapi
(PATH=/opt/zimbra/openldap-2.4.17.8z/var/run/ldapi)
Aug  8 15:08:50 freelancer slapd[1937]: conn=16 op=0 BIND dn="cn=config"
method=128
Aug  8 15:08:50 freelancer slapd[1937]: conn=16 op=0 BIND dn="cn=config"
mech=SIMPLE ssf=0
Aug  8 15:08:50 freelancer slapd[1937]: conn=16 op=0 RESULT tag=97 err=0 text=
Aug  8 15:08:52 freelancer slapd[1937]: conn=16 op=1 MOD
dn="olcDatabase={2}hdb,cn=config"
Aug  8 15:08:52 freelancer slapd[1937]: conn=16 op=1 RESULT tag=103 err=0 text=
Aug  8 15:08:56 freelancer slapd[1937]: conn=16 op=2 MOD
dn="olcDatabase={2}hdb,cn=config"
Aug  8 15:08:56 freelancer slapd[1937]: conn=16 op=2 RESULT tag=103 err=0 text=
Aug  8 15:09:33 freelancer slapd[1937]: conn=16 fd=23 closed (connection lost)