www/trac-attachmentpolicy/pkg-descr

   1 Adds permission TICKET_ATTACHMENT_DELETE for exclusive right
   2 to delete and replace attachments, regardless who added/changed it.
   3
   4 Everybody who has permission TICKET_ATTACHMENT_DELETE can delete
   5 or replace attachments, regardless who added / changed it.
   6
   7 WWW: http://trac-hacks.org/wiki/AttachmentPolicyPlugin