introduced when Local_to_global was introduced.
(copy_person): Likewise.
(copy_text_stat): Added a const qualifier.  Rewritten to decrease
	the probability that the same kind of bug is introduced here, that
	is, assign each field separately instead of assigning the entire
	struct at once.
(copy_aux_item_list): Now static.  Rewritten as above.
(coy_aux_item): Added const qualifier.  Rewritten as above.

(copy_text_list): Removed.
(clear_conference): Adjusted to the fact that the texts member of
	Conference is now a l2g.
(init_conference): Likewise.
(copy_conference): Likewise.  Added const qualifier to the argument.
(clear_person): Adjusted to the fact that the created_texts member
	of Person is now a l2g.
(copy_person): Likewise.
(init_person): Likewise.
(init_text_list): Removed.
(copy_aux_item_list): Added const qualifier to the src argument.

Some initial (nonworking) code for a one-pass sync.

               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

(init_static_session_info): New function.

any files.

changed name.