DIP Draft Review: ref const(T) should receive r-values

[Mike Parker]

This DIP is a candidate to become DIP 1014. There's already been 
some discussion about this in the forums and some feedback on the 
PR, but more Draft Review feedback is needed.

The intent of the Draft Review is primarily to find obvious flaws 
with the DIP, e.g. structural faults, uncovered bases, lack of 
clarity, etc.. At this stage of the process, the end goal is to 
shape the DIP into a strong draft for in-depth review. Feedback 
at this stage will not be included in the review summary, so any 
theoretical discussions or in-depth examination of minutiae are 
best saved for the community review.

Please keep feedback on the DIP in the PR thread.

Thanks in advance to all who participate.