Changes

GLContextImpl: Detect "llvmpipe" as a software renderer (Mesa 8.0.1)

X11GLXContext: X11Util.setX11ErrorHandler( .., DEBUG ? verbose : quiet )

Fix / Cleanup AWT related Threading code: Using enums, properly disable singlethreading if requested, fix doc: -Dopengl.1thread -> -Djogl.1thread

Cleanup: Use getThreadName() and validateCurrent() to remove redundancy and to add thread-name info; GLWorkerThread: Use ArrayList and generics.

Fix bug 564 - part 2 (X11 Mesa 8.0.1 GL 3.0 w/ failing GLX_ARB_create_context)

Tolerate a buggy ARB createContext impl (always failing to create a context).

Now we only reset the GLContext state and
set the context/device availability flag if ARB create context actually was successful.
Otherwise the fallback 'old' context is being used w/o having it's context state cleared
and context/device availability is set later on.

This makes the general use of ARB_create_context more stable.

+++

Minor changes:

- Non compatibility fallback: Try forward context instead.
- Limit ARB context 'seeking' to >= OpenGL 2.0