Change aci syntax to Directory String.

The aci attribute is currently defined with a syntax of IA5 String.
This syntax only allows 7-bit characters.  Now that the server has
support for syntax validation, this would prevent one from using
international characters in aci rules.  This patch defines the aci
attribute with the Directory String syntax, which allows any valid
UTF8 character.

ldap/schema/00core.ldif

@@ -25,7 +25,7 @@ aci: (target="ldap:///cn=schema")(targetattr !="aci")(version 3.0;acl "anonymous
 #
 attributeTypes: ( 2.16.840.1.113730.3.1.55 NAME 'aci'
   DESC 'Netscape defined access control information attribute type'
-  SYNTAX 1.3.6.1.4.1.1466.115.121.1.26
+  SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
   USAGE directoryOperation
   X-ORIGIN 'Netscape Directory Server' )
 #