Missing attribute from Amavis LDAP schema for LDAP disclaimer support

[Mark Martinec]

Quanah,

>>> With this in place, I can now enable/disable per-domain disclaimers
>>> without  having to restart Amavis, which is great!
>> 
>> Thanks!  Adding this to LDAP.schema.
>> Missed the 2.8.1, but it will be in the next version.
> 
> Unfortunately, one more change is also required -- The attribute needs
> to be added to the objectClass as well.  Otherwise it can't be set.

Will be fixed in 2.10.0,
thanks!

   Mark