Migrating to Shared

[BCS]

Hello Brian,


> I like this development, the only thing that makes me wary is the
> implied TLS behavior. I think I'd personally prefer it if tls was a
> keyword as well, and all globals had to have either tls or shared (or
> __gshared) in their type, rather than defaulting to tls if none is
> specified. So we'd force the programmer to explicitly define the level
> of sharing.


I'm fine with the implicit but I'd like to see the explicit form as well 
(so they wouldn't pop up from -vtls).