Fix #2529: explicit protection package #3651

[Dicebot via Digitalmars-d-announce]

On Saturday, 23 August 2014 at 10:04:40 UTC, Dmitry Olshansky 
wrote:
>> If the user relies that a symbol is found in
>> std.internal.regex.backtracking, moving it will break the code 
>> too. So
>> what's the difference?
>
> I don't see the difference. In any case user should see public 
> aliases and never know where they lead to. Dicebot - any 
> objections?

Well difference is that "internal" substring in the fully 
qualified name that is much more likely to tell user he is better 
to not touch it. However, original Kagamin proposal of embedding 
it into module names themselves does address that if you are ok 
with resulting uglyness.