(count_recipients): const qualifiers added to some arguments.  Code simplified.
(count_footn): Likewise.
(count_comment): Likewise.
(text_read_access): Code clarified.
(delete_text): Likewise.
(find_recipient): qualifiers added to some arguments.
(is_comment_to): Likewise.
(is_footnote_to): Likewise.
(submit_to): Likewise.
(is_member_in_recpt): Likewise.
(send_async_sub_recipient): Likewise.
(sender): Likewise.
(is_sender): Likewise.
(is_comm_sender): Likewise.
(check_footn): Likewise.
(check_comm): Likewise.
(locate_mark): Likewise.
(skip_recp): Likewise.
(recp_sent_by): Likewise.
(filter_secret_info): Likewise.
(send_async_deleted_text): Likewise.
(check_double_subm): Likewise.
(check_double_comm): Likewise.
(send_async_new_text_old): Likewise.
(send_async_new_text): Likewise.
(send_async_add_recipient): Likewise.