DMD 2.100, bring ont he attribute soup

[deadalnix]

So I upgraded to 2.100

It is now reporting DIP100 deprecation by default.

Fantastic. Every single one of them is a false positive so far. I 
now face the situation where I will have deprecation warning 
forever, or add attribute soup to the program.

This is the opposite of progress. Stop it.

I'd be happy to add attributes for something that could actually 
track ownership/lifetime. DIP1000 is not that. Adding attributes 
for that is not worth it.