Merge branch 'texformat-rework'

Conflicts:
	src/mesa/drivers/dri/radeon/radeon_fbo.c
	src/mesa/drivers/dri/s3v/s3v_tex.c
	src/mesa/drivers/dri/s3v/s3v_xmesa.c
	src/mesa/drivers/dri/trident/trident_context.c
	src/mesa/main/debug.c
	src/mesa/main/mipmap.c
	src/mesa/main/texformat.c
	src/mesa/main/texgetimage.c