Licences issues with d runtime

[Robert Jacques]

Deep in the 'eliminate writeln et comp?' thread there's been a recent  
discussion about the confusion over Tango licences. In particular,  
regarding the desire that the standard library shouldn't require binary  
'copies' (a.k.a. every single executable compiled using it) from  
publishing/containing the library's licence. (And specifically, trying to  
understand the AFL) Anyways, I recently checked D2, and about half the  
druntime files are in BSD (which require publication) while the other half  
are in the zlib/libpng/Phobos licence (which doesn't).

This is a serious legal obligation which isn't in the primary DMD licence  
or readme. Would it be possible for the licence in druntime to be unified?  
(If not, a more prominent notice would be appreciated)

Thank you.