I don't think that's the point trollwarrior. Those enums that agent listed are available in prior versions of LWJGL.
Hmmm you're right ofcourse. I checked the int values and they are the same. I don't think there is a problem with it being a duplicate. I mean, it might just make things easier.. Probably was put there on purpose, so you don't have to import GL11 at all (you know, deprecated)