HTTPS binding configuration for Kestrel

[javiercn]

We need to figure out how config for HTTPS will work for Kestrel in development. (Config format for setting up an HTTPS binding and how will tooling setup the bindings during development).

This is part of our plan for HTTPS in 2.1

[muratg]

@CesarBS assigning this to you. I suspect we'll need to design this. cc @shirhatti and @davidfowl

[Tratcher]

How much of this is just bringing back the config feature we cut from 2.0?

[muratg]

@shirhatti will schedule a design meeting to plan this work.

[muratg]

@shirhatti where are we with this one?