[quake3] [PATCH] Mac OSX support

[Ryan C. Gordon]

> Oh, sorry.  I guess I was just a bit confused by the comments in Anders' SDL
> patch which seemed to indicate that dlopen() should be used pre-10.3.  And
> also by the fact that ioq3 did not use .bundle previously.

There's no dlopen() function in Mac OS X before 10.3. SDL reimplements 
dlopen() internally using lower level Carbon calls to retain 10.2 
compatibility.

Dynamic libraries, unlike bundles, can't be unloaded on Mac OS X, which 
might be why ET has that requirement.

--ryan.