Want reasonable reference counting? Disable automatic sharing of immutable

[Steven Schveighoffer]

On 11/12/21 2:38 PM, Kagamin wrote:
> The very idea is strange. If RCSlice is mutable, how can it be 
> immutable? Something doesn't add up.

Look up logical const, that is what this is. The mutable part never is 
immutable or const. We just also don't want it to be shared by default.

See also, C++ mutable keyword.

-Steve