Decimal string to floating point conversion with correct half-to-even rounding

[Walter Bright]

On 7/5/2020 3:35 AM, Walter Bright wrote:
> All of DMD, Druntime, and Phobos use Boost, except for Curl and the zip library 
> (which we probably shouldn't have added).

Also, there are no dependencies on Curl and zip.

We don't distribute the C libraries, we use whatever is on the user's system.