GL_REGAL_enable
https://github.com/p3/regal/blob/master/doc/extensions/GL_REGAL_enable.txt
GL_REGAL_enable
	GL_ERROR_REGAL 0x9322
	GL_DEBUG_REGAL 0x9323
	GL_LOG_REGAL 0x9324
	GL_EMULATION_REGAL 0x9325
	GL_LOADER_REGAL 0x9326