ntpq peers formatting needs floating point for time slots.

[Hal Murray]

I just pushed a fix.  Please test.

I bumped the width from 78 to 79.  If that screws up, we should document a 
test case.  I'm assuming the output supports an 80 character line.

There was a space-space before the delay column.  I grabbed one of them.  
Those 2 extra spaces let me change the width of the last 3 columns to 8 
characters.  (1 was already 8, the other 2 were 7)

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