GitLab

	ay_new_text.  Added ay_leave_conf.

               Documented the aux-item definition file format.
               Updated the database format documentation.

Server:        Implemented aux-items.
               Checked error returns and set error-status to something
                   useful in most cases.
               New RPC calls:
                   create-text
                   create-anonymous-text
                   create-conf
                   create-person
                   get-text-stat
                   get-conf-stat
                   modify-text-info
                   modify-conf-info
                   get-info
                   modify-server-info
                   get-collate-table
                   set-expire
                   query-unread-texts
               New asynchronous messages:
                   new-text
                   deleted-text

(Async): Added ay_dummy_last
(ASYNC_DEFAULT_MESSAGES): New define.

	since they are no longer used.  Commented out ay_conf_deleted
	and ay_conf_created since they are not yet used.