Disable OpenGL extentions

[Xaphier]

I wrote a patch for EL to be able to dis-/enable OpenGL extentions based on the settings of an "ini" file. The only drawback is that I used boost spirit for the parser. I mainly worte the patch to be able to disable OpenGL extentions for testing.

[Entropy]

Well, I think that for the time being, we can just have a function like: fix_driver_issues() where we have a manually built table like this:

typedef struct {
char extension_to_disable[128];
char videocard_vendor[64];
int driver_version;
int driver_versions_lower_than;
int driver_versions_higher_than;
}bad_extensions;