Description of problem:
slapd and or cn=schema,cn=config are missing attributes for olcMirrorMode and olcServerID. Attempting to load a configuration with either of these author supported directives FAILS. These schema attributes and directives are required to configure N-WAY MultiMaster replication with openldap. 

Version-Release number of selected component (if applicable):
openldap-servers-2.3.43-12.el5_5.2


How reproducible:
attempt to insert either olcServerID or olcMirrorMode attribute and values into dn: cn=config or dn: olcDatabase={0}config,cn=config respectively. 


Steps to Reproduce:
1.create an ldif for dn: cn=config with the values of olcServerID: 1
do an ldapadd of your ldif
create an ldif for dn: olcDatabase={0}config,cn=config with the values of olcMirrorMode: TRUE
do an ldapadd of you ldif

#ldapadd -x -D 'cn=root,cn=config' -w sneakysecret -f /tmp/syncrepl.ldif
modifying entry "olcDatabase={1}bdb,cn=config"
  
Actual results:

ldapmodify: Undefined attribute type (17)
        additional info: olcMirrorMode: attribute type undefined

Expected results:
The ldapadd should not complain and the atribute should be viewable by ldapsearch under base olcDatabase={1}bdb,cn=config. 

Additional info: