core.sys/core.stdc vs. std.c?

[David Nadlinger]

core.stdc is the place for C standard library modules, core.sys.* are 
where the C operating system header translations reside – this is our 
current policy, right? If so (I can't actually remember any formal 
decision or discussion), is there a reason we still have so much code in 
std.c?

David