be invisible.

fail.

integration.  Block clients, and make them invisible for all other
clients, until the DNS lookup has completed.

The session_start field of a Connection was used both to record the
connect time and the login/logout time.  As a result, the
connection-time of a Static-Session-Info was not actually static.
Fixed by keeping track of the connect time and the login/logout
separately.

(Function Templates for send-async.c): Include a call to
	handshake_ok() in prototype code.
(Traversing Connections): Ditto.

The API is now callback-based.  The current implementation still uses
gethostbyname, though.

(isc_dns_resolve_cb): New function.

(isc_resolve_done_cb): New callback.
(struct isc_scb): Added the field "remote".
(isc_gethostname): Removed.
(isc_resolve_remotem): New function.

(isc_destroy): Cancel any pending dns query, and clear remote.

(isc_resolve_remote): New function.
(isc_gethostname): Removed.

	information is no longer stored in the connection.

	completed the handshake or not.
(dns_resolution): New function.
(get_host_name): Removed.
(login_request): Reorganized the code to use the new
	callback-driven API of ISC host lookups.
(handle_accept_event): Call set_time(), so that the connect_time
	is set correctly.

	login_time.  All users updated.  Removed the hostname field,
	since that is now stored as isc_session->remote.  Added
	dns_done, blocked_by_dns, and remote_ip.

(new_client): Set both connect_time and login_time.
(kill_client): Clear the remote_ip.
(handshake_ok): New function.

(handshake_ok): New function.

	if the dns resolution hasn't completed yet.

	the message to the client.  As a result, the message will not
	be sent until the DNS lookup has completed.
(async_new_text): Ditto.
(async_i_am_on): Ditto.
(async_logout): Ditto.
(async_new_name): Ditto.
(async_forced_leave_conf): Ditto.
(async_login): Ditto.
(async_deleted_text): Ditto.
(async_new_recipient): Ditto.
(async_sub_recipient): Ditto.
(async_new_membership): Ditto.
(async_new_user_area): Ditto.
(async_garb_ended): Ditto.
(async_sync_db): Ditto, but ignore the DNS lookup.
(async_rejected_connection): Ditto.

(login_old): Set login_time, not connect_time.
(login): Ditto.
(logout): Use login_time, not connect_time.
(who_is_on): Removed dead code.
(who_is_on_ident): Ditto.
(who_is_on_dynamic): Removed dead code.  Don't include sessions
	until the handshake is completed.
(get_session_info): Don't include sessions until the handshake is
	completed.
(get_session_info): Use connect_time, not login_time, as the
	connection_time.
(get_static_session_info): Don't include sessions until the
	handshake is completed.  Use connect_time, not login_time, as
	the connection_time.
(get_session_info_ident): Ditto.
(disconnect): Don't include sessions until the handshake is
	completed.
(get_client_name): Ditto.
(get_client_version): Ditto.

warnings from <float.h>.

	avoid having it linger in the input buffer.

isc_scb instead of a user-supplied pointer to the callback.

(isc_write_error_cb): Removed the cb_mcb and user arguments.
(isc_stale_output_cb): Ditto.
(isc_set_read_callback): Removed the user argument.  Use the udg
	field of the isc_scb instead.

(stale_cb): Adjusted to the new API of the callback functions.
(idle_cb): Ditto.
(isc_set_read_callback): Removed the user argument.
(isc_check_read_callback): Pass the isc_scb object instead of the
	user-supplied pointer to the on_fd.

(stale_cb): Ditto.
(idle_cb): Ditto.
(login_request): Ditto.
(data_available_callback): Ditto.
(handle_accept_event): Ditto.

	functions.

	isc_accept_callback typedef.

	that it interferes with the test suite.

Plug a memory leak in a test program.