modesetting: Don't leak modifier list when creating a front bo

glamor: xfree86: Fully separate xfree86 glamor egl code from generic code

glxmor/glamor_egl: Move `glamor_egl_close_screen` to the post screen close hook

glamor/glamor_egl: xfree86/glamor_egl: Split generic and xf86 glamor egl code

glamor/glamor_egl.c: Split `glamor_egl_init` into generic and xf86 parts

glamor/glamor_egl.c: Only use `ScrnInfoPtr` in the xf86-only code

glamor/glamor_egl.c: Begin spliting xf86 code from generic glamor egl code

glamor/glamor_egl.c: Check if at least one (format, modifier) pair is supported

os: add busfault dummy struct

clang: don't use gnu_printf attribute

modesetting: find the first compatible dri device as default

Support `XDG Base Dir Spec 0.8`.

Add compatibility define for `pci_device_is_boot_display()`

modesetting: Empty damage once dispatch is done

modesetting: Don't recursively force present to unflip