The function glProgramParameteri does not get generated
The function _glProgramParameteri_ is unavailable in a generated header file that includes the _GL_ARB_separate_shader_object_ extension. _glProgramParameteri_ is clearly listed as being part of that extension at https://www.opengl.org/registry/specs/ARB/separate_shader_objects.txt. Other functions that are part of this extension are available.

I use Glad on Windows with the following command, altough I don't think that is part of the problem:
python Glad\main.py --profile=core --out-path="%CD%" --api="gl=3.3" --spec=gl --extension="GL_ARB_separate_shader_objects" --generator=c --omit-khrplatform --local-files

The generated header file looks like this:
[glad.h.txt](https://github.com/Dav1dde/glad/files/671108/glad.h.txt)


