Consider processing Markdown links in build setting info descriptions

[dempseyatgithub]

A number of build setting descriptions now contain Markdown links:

You can find more information at [our online reference](https://developer.apple.com/etc/etc)

It would make for a cleaner info comment to strip out the square brackets and add a space between the text and the parenthetical URL. The parenthesis probably still makes sense to include. So process to be:

You can find more information at our online reference (https://developer.apple.com/etc/etc)

[dempseyatgithub]

Possibly give users the opportunity to strip out the URL as a preference? Note that, as in the example above, doing so may make certain phrases meaningless without the link.