mark-as-read on deleted texts.

(SERVER-COMPAT-VERSION): 20004.

long time ago.

	company Cendio Systems.

(Document Revision History): Documented changes for 10.3.

(who_is_on_ident): Likewise.
(who_is_on_dynamic): Likewise.
(get_session_info): Likewise.
(get_session_info_ident): Likewise.
(who_is_on_old): Likewise.

allowed-content-type aux-items.  Renumber.

allowed-content-type.

	    cross-reference += letterbox
	    redirect += letterbox
	    x-face += letterbox, server
	    alternate-name += letterbox
	    mx-allow-filter += letterbox
	    mx-reject-forward += letterbox
	    allowed-content-type += letterbox, server
Updated the description of the allowed-content-type aux item.

IscSession.  Handle isc_getraddress() failures properly.

warnings from glibc-2.1.3/gcc-2.95.2.

	isc_getraddress() fails.

	cases and never used.

everywhere.  Tighten the rules so that secret info cannot leak through
get-text-stat.  Re-indent text.c.  Add a few const qualifiers all over
the code.

	Give authors special privileges regarding bcc-recpts.

	same visibility is used by async-sub-recipient and get-text-stat.
(filter_secret_info): Don't allow the author of a text to see
	bcc-recpt which are secret to him.  Simplify the code slightly.
(send_async_add_recipient): Use filter_secret_info() so that the
	exact same visibility is used by async-add-recipient and
	get-text-stat.

(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.

(access_perm): Likewise.
(locate_membership): Likewise.