- Package vboximg-mount correctly. boo#1200769.

- Explicitly BuildRequire pkgconfig(glx) and pkgconfig(glu): This
happened to be pulled in by SDL-devel, but with the switch to
sdl12-compat, this no longer happens. Virtualbox explicitly
checks for them though, so it is our own responsibility to have
those deps in place.

- Update fixes_for_kernel_5.18.patch to save and restore FPU status during interrupt.
The change fixes boo#1199803.

- Update support of building with Python
* Add vbox-python-py310.patch for support of Python 3.10
https://github.com/archlinux/svntogit-community/commit/59d75cd22
https://www.virtualbox.org/changeset/90537/vbox
https://www.virtualbox.org/changeset/86623/vbox
* Drop switch_to_python3.4+.patch and vbox-python-detection.diff;
replace by vbox-python-selection.patch for what is left of the
above after removing some obvious cruft. Could still be more in
there.
* Remove unnecessary reusage of old python2 macros, we use
python-rpm-macros already.

- Replace SDL-devel BuildRequires with pkgconfig(sdl): allow to use
sdl12_compat as an alternative.

- Filter out rpmlint error that is valid for qemu, but will
have its badness increased in the future.