String getPrefixedPropertyName(@Nonnull final String propertyName) {
        return propertyPrefix == null ? propertyName : propertyPrefix + "." + propertyName.substring("ldap.".length());
    }
Provides singleton access to a named instance of the LdapManager class.

This constructor is useful when several, different LDAP configurations are used (eg: A Hybrid Provider that
uses more than one LDAP server).

@param name The name of the ldap instance.
@return an LdapManager instance.
xmppserver/src/main/java/org/jivesoftware/openfire/ldap/LdapManager.java