Adding Markdown to Ddoc

[Adrian Matoga]

On Wednesday, 6 December 2017 at 12:13:56 UTC, Walter Bright 
wrote:
> On 12/5/2017 8:11 PM, Walter Bright wrote:
>> (I know this has come up before, and I've been opposed to it, 
>> but I've changed my mind.)
>
> Part of this change of mind was driven by the bit of markdown 
> that Ddoc already supports - the backticks to quote code and 
> auto detection of URLs - and how nice that has turned out.

This is going to be the right time to deprecate the automatic 
change of some words that happen to be parameter names into code. 
:)