LC_NUMERIC progress.

[John Darrington]

I'm slowly working my way through all the places where I think setting 
LC_NUMERIC could cause
problems.

I see that we are using dtoastr from gnulib in a few places.  There does not 
seem to be any 
locale independent version of this function.  Either we will need to write one, 
or we will 
need to use something else.

Do we need to use this function, or would c_strtod to the job ?

J'

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