[RFA] Add some VAX floating point formats to floatformat.[ch]

[Nick Clifton]

Hi Mark,

>>>+  /* VAX byte order.  */
>>>+  floatformat_vax
>>
>>I think that having a more descriptive comment for the VAX byte order
>>would be helpful.  eg describing the layout of 1.2345678e10 as is done
>>with the other entries in this enum.
> 
> Could do that, although it wouldn't be particular useful.  VAX is not quite
> IEEE, so the bytes will be completely different, not just shuffled around.

Ok well then how about the comment containing a quick precis of the VAX 
format.  I am sure that various people will be interested to read it.

Cheers
   Nick