OpenLDAP自定義屬性的啓用

# ucode
# This multivalued field is used to record the values of the license or
# registration plate associated with an individual.
attributetype ( 2.16.840.1.113730.3.1.900
    NAME 'ucode'
    DESC 'user code'
    EQUALITY caseIgnoreMatch
    SUBSTR caseIgnoreSubstringsMatch
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )