uucico time check wraparound

[utzoo!henry]

The time check ("is it OK to call X now?") in uucico does not allow for
the possibility that the time range might wrap around (e.g. "2300-0800";
we have some odd long-distance discount schedules here).  It takes such
ranges to be "never".  To fix this, make the following change near the
end of conn.c/ifdate():

	< 	if (tn >= tl && tn <= th)
	<		return(1);
	---
	> 	if (tl <= th && (tl <= tn && tn <= th))
	> 		return(1);
	> 	if (tl >= th && (tl <= tn || tn <= th))
	>		return(1);