(isc_write): Handle struct isc_scb_internal.

(isc_findsession): Handle struct isc_scb_internal.
(isc_remove): Handle struct isc_scb_internal.

(write_cb): Handle struct isc_scb_internal.
(isc_oflush): Handle struct isc_scb_internal.

(isc_session_cfg): Ditto.
(isc_scb_entry): Ditto.
(struct isc_scb): Moved a lot of fields to struct isc_scb_internal
	in intern.h.
(struct isc_mcb): Moved to intern.h.
(isc_getoopsource): New function.

(dump_stats): Print the max_seen field.
(init_stats): Initialize it.
(update_history): Update it.
(check_one_stat): Take max_seen into account when deciding if a
	message should be logged or not.  Reset max_seen if a new
	value is stored.

after a timeout, but that isn't implemented yet.

	argument, that is a list of arguments to pass to
	get-time-often.

a while.

(check_one_stat): Don't report very small rounding errors when the
	correct value is 0.

snprintf.  Fix "pack" warnings in Xenofarm.  Xenofarm: ignore more
warnings.

we can reliably divert the "program not found" error message to
stdout.  Use "find ... -print" instead of "find ... -ls", since -ls is
a GNU extension.

	available.

	rounding error.  Report the values using %g instead of %f.

"sherr.txt".

Improve handling of busy clients.  Improve test suite for busy
clients.

	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.

(slow): Removed.
(fast): Removed.
(monitor_progress): New proc.

(parse_async): Fixed off-by-one parse error.  Report parse errors
	more verbosely.
(report_progress): New function.  Report progress, but print
	nothing unless we have received a new reply from the server
	since the last time we were called.
(longopts): New constant.
(main): Use getopt_long to parse the arguments.  Enable progress
	report.  Fixed a broken printf format string.

(ind): Changed sign of the "offset" argument, since it is a bad
	idea to store a negative number in an "unsigned int".  All
	callers updated.
(update_one_stat): Fixed the call to check_stat when DEBUG_STATS
	is true.
(check_one_stat): If a rounding error occurs, log which enum
	value_type that is responsible.