param.default_priority and param.default_weight.
(adjust_penalty): Use the weight to reduce the penalty.
(get_scheduling): Return the actual scheduling information from
	the connection.
(set_scheduling): Check the priority and weight against
	param.max_priority and param.max_weight.  Allow the user to
	change them, as long as it is done within those limits.  Store
	the new values in the connection.  Note: the current
	implementation cannot handle more than one priority.  The
	check for that is made in server-config.c.

(may_change_scheduling): New static function.
(set_scheduling): New request.

lyskomd.

	due to "nxdomain" or "inconsistent".

(toploop): Simplify code by using enable_idle_check().

(dns_resolution): Schedule an idle check, as a client may have
	become unblocked.  Don't call isc_enable() here.  Instead, add
	the session to the run-queue.  There may be pending input in
	the input buffer.  Handle ADNS errors.
(login_request): Check the return value of isc_resolve_remote().
(read_from_connection): Return if the session is blocked by DNS.

	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.

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

(login_request): Pass idle_cb() to isc_set_read_callback().

(toploop): Cancel the timer for check_kill_flag if needed during shutdown.

	even if the client is disconnecting.  We want it to have a
	chance see the reply to the disconnect or shutdown request.

(check_kill_flg): Ditto.
(read_from_connection): Ignore connections with a pending kill.
(toploop): Call check_kill_flg() during shutdown if any kill is
	pending, so that the kill list is freed.

(login_request): Pass stale_cb to isc_set_read_callback().
(setup_timer): Moved to timeval-util.h, and added a return value.
	All callers updated to check it.

	accessing the internals of the isc_mcb structure.
(data_available_callback): Ditto.

	more from this
(read_from_connection): isc_disable() can fail.  Handle that case.
(check_idle_callback): Make sure the same connection is never
	processed more than once during a call to this function.

	It has to be connected a while to earn the right to do
	anything.

(queue_remove): Don't update STAT_RUN_QUEUE_LEAVE.
(parse_unparsed): Update STAT_REQUESTS instead of
	STAT_PROCESSED_CALLS.
(get_host_name): Don't update STAT_PROCESSED_DNS.

(login_request): Ditto.
(get_host_name): Update the STAT_DNS_QUEUE and STAT_PROCESSED_DNS
	statistics.

(queue_remove): Ditto.
(parse_unparsed): Ditto.

	the queue of pending clients.

	Don't call isc_flush().
(read_from_connection): Call isc_flush() once if parse_unparsed()
	returned true at least once.

(check_idle_callback): Break out of the loop and return OOP_HALT
	if go_and_die is true.

(setup_timer): Ditto.
(garb_callback): Moved to text-garb.c.
(saver_callback): The source argument is actually used.
(toploop): Moved the garb timer to text-garb.c.
(server_idle): New function.

<sys/time.h> directly.

(dump_statistics): Ditto.
(saver_callback): Ditto.
(setup_timer): Replaced the milliseconds argument with a struct
	timeval argument.
(garb_callback): Simplified the code.

	out-of-range.

	already present on the kill list.  With the liboop callbacks
	that can happen and is not an error.
(write_err_cb): Don't log an error for ECONNRESET.
(read_from_connection): Removed left-over debug code.
(enable_idle_check): Ditto.
(check_idle_callback): Ditto.

(penalty_generation): New static variable.
(work_done): Ditto.
(is_idle): Ditto.
(queue_first): Ditto.
(queue_last): Ditto.
(kill_pending): Ditto.
(do_statistics): Variable removed.
(queue_add): New static function.
(queue_remove): Ditto.
(set_time): Ditto.
(logout_client): Remove the client from the queue of pending clients.
(parse_unparsed): Add penalty points for finished calls and protocol
	errors.  Don't delete the parsed part of unparsed.
(parse_message): Function removed.
(logout_request): Function removed.
(parse_forgotten): Ditto.
(message_request): Ditto.
(add_to_kill_list): Add an oop timer event callback to check_kill_flg
	when a client is added to the kill list.
(check_kill_flg): Changed API: this is now an oop timer callback
	function.
(write_err_cb): New static function.
(adjust_penalty): Ditto.
(read_from_connection): Ditto.
(setup_timer): Ditto.
(enable_idle_check): Ditto.
(check_idle_callback): Ditto.
(garb_callback): Ditto.
(saver_callback): Ditto.
(data_available_callback): Ditto.
(handle_accept_event): New function.
(login_request): Take an isc_scb as argument instead of an isc event.
	Add read and write error callback functions for the new client.
(toploop): Rewritten to use liboop.

(kill_list_size): Now static.

(dump_connections): Ditto, and i_rename instead of rename.

	returns with EINTR during the Xenofarm tests.

	down spurious errors from the rename that I don't understand.

	the file descriptor is above fd_ceiling.  This can only happen
	if USING_RLIMIT_NOFILE is undefined, so ifdef out this code.