[dmd-beta] Migration path for enum Endian?

[Jonathan M Davis]

Also, I would point out that because you can't deprecate enum values, the only 
deprecation path is to have to have soft migration followed by removal. So, I 
don't know how much code breakage you're really saving by leaving the old enum 
values in temporarily. We can still do it, but the deprecated keyword and 
whatever it brings to the table can't be involved in the process, because you 
can't put attributes on enum values.

Fortunately, there weren't all that many enum values in Phobos which didn't 
follow the correct naming conventions outside of std.socket, and after this 
release, the only enum values with incorrect names should be the ones in 
std.socket, which looks like it's probably going to be revamped anyway.

- Jonathan M Davis