looks like no one read the DIP till the last section :)
I proposed there 2 ways to support both current flags and new flags, without possible confusion nor code breakage.
2a): dmd -flagstyle=new -of=blah ... (+ other stuff/deprecations taken into account) 2b): dmd2 (reminds of D2, ldc2, ldmd2), which behaves as dmd -flagstyle=new.
Either of those 2 options will break nothing, code that uses dmd -ofblah (etc) would continue to work. It's all described in DIP. Improvements are welcome.
