Mini proposal: rename float.min to float.min_normal

[Jeremie Pelletier]

bearophile wrote:
> Don:
> 
>> such as X86_64 and D_InlineAsm_X86<
> 
> I don't like the identifier that denotes D2 code ("D_Version2").

I never use it either, this identifier is rather pointless. Both 
compilers will still parse both conditions and errors on the branch for 
the other version.

>> If there is no objection to this, I will create a patch. It's very simple.
> 
> I usually like all your proposals about floating point numbers :-)

I agree, its a good change! I would also change float.min to be an alias 
of -float.max.

Jeremie