[LEAPSECS] Implementation for |UTC-UT1| > 1 s

[GERRY ASHTON]

Perhaps this is too obvious to mention, but if there is a desire to allow |UTC-UT1| somewhat greater than 1 s, but much less than 1 minute, in order to schedule leap seconds further in advance, it will still be necessary to limit each correction to 1 s. This is because a vast number of standards do not allow the number of the second to reach 61.