still returns EINVAL sometimes.

<sys/time.h> directly.

files that needs to include either file now does so via this wrapper.

	Break overly long lines.

optional suffix such as "hours" appended.  Store them as a struct
timeval, not as an int, so that the bulk of the code doesn't have to
take the unit into account.  Use "struct timeval" instead of a number
of milliseconds or seconds in several places.  This fixes a number of
potential and actual overflows.  Added utility functions for struct
timeval.

(create_text_add_miscs): Ditto.
(do_create_text): Ditto.
(add_recipient): Ditto.
(add_comment): Ditto.
(add_footnote): Ditto.

(sync_part): Return a struct timeval instead of a long.  Use
	struct timeval instead of a time_t.  Use timeval_remaining()
	to simplify the code.
(init_cache): Use a struct timeval instead of time_t.
(cache_sync_all): Adjusted to new API of sync_part().

(login_old): Ditto.
(login): Ditto.
(get_static_session_info): Ditto.
(get_time): Ditto.
(logout): Ditto.  Use timeval_diff_sec instead of ldifftime.
(who_is_on_dynamic): Use timeval_diff_sec instead of ldifftime.
(get_session_info): Ditto.
(get_session_info_ident): Ditto.

	timeout", "Sync timeout", "Garb interval", "Sync interval" and
	"Sync retry interval" from int to timeval, and added
	appropriate default suffixes to those configuration
	parameters.

(main): Adjusted for the new type of current_time.

(do_add_member): Ditto.

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

(suffix_table): New table.
(assign_timeval): New assigner.

	struct timeval: garb_busy_postponement, garbtimeout,
	synctimeout, garb_interval, sync_interval and
	sync_retry_interval.

	fields from time_t to struct timeval.

(assign_timeval): New assigner.

(timeval_nonzero): New function.
(timeval_zero): Ditto.
(timeval_ctor): Ditto.
(timeval_remaining): Ditto.
(timeval_greater): Ditto.
(timeval_less): Ditto.
(timeval_diff_sec): Ditto.

	out-of-range.

Make gdb find the liboop sources.