add domainComponent as alternative name for 'dc' (per rfc2253)

misc other clean up

servers/slapd/schema/core.schema

@@ -525,22 +525,22 @@ attributetype ( 1.3.6.1.4.1.1466.101.119.4 NAME 'dynamicSubtrees'
 	SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 NO-USER-MODIFICATION
 	USAGE dSAOperation )
 
-#
-# RFC2247
-attributetype ( 0.9.2342.19200300.100.1.25 NAME 'dc'
-	DESC 'RFC2247 domain component'
+# RFC1274 + RFC2247
+attributetype ( 0.9.2342.19200300.100.1.25
+	NAME ( 'dc' 'domainComponent' )
+	DESC 'RFC1274/2247 domain component'
 	EQUALITY caseIgnoreIA5Match
 	SUBSTR caseIgnoreIA5SubstringsMatch
 	SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 SINGLE-VALUE )
 
+# RFC2247
 objectclass ( 1.3.6.1.4.1.1466.344 NAME 'dcObject'
 	SUP top AUXILIARY MUST dc )
 
-# RFC1274
+# Derived from RFC1274
 attributetype ( 0.9.2342.19200300.100.1.1 NAME ( 'uid' 'userid' )
 	DESC 'RFC1274 user identifier'
-	EQUALITY caseIgnoreMatch
-	SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
+	SUP name )
 
 # RFC2377
 objectclass ( 1.3.6.1.1.3.1 NAME 'uidObject'
@@ -558,19 +558,19 @@ attributetype ( 2.16.840.1.113730.3.1.34 NAME 'ref'
 
 objectclass ( 2.16.840.1.113730.3.2.6 NAME 'referral'
 	DESC 'nameref referral object'
-	SUP top STRUCTURAL MAY ( ref ) )
+	SUP top STRUCTURAL MAY ref )
 
 #
 # LDAPsubEntry
 #	likely to change!
 objectclass ( 2.16.840.1.113719.2.142.6.1.1 NAME 'LDAPsubEntry'
 	DESC 'LDAP Subentry'
-	SUP top STRUCTURAL MAY ( cn ) )
+	SUP top STRUCTURAL MAY cn )
 
 #
-# LDAProotDSE
+# OpenLDAProotDSE
 #	likely to change!
 objectclass ( 1.3.6.1.4.1.4203.666.3.2
 	NAME ( 'OpenLDAProotDSE' 'LDAProotDSE' )
 	DESC 'OpenLDAP Root DSE object'
-	SUP top STRUCTURAL )
+	SUP top STRUCTURAL MAY cn )