This pull request contains the following bug fixes for UML:

- Make sure to set a default console, otherwise ttynull is selected.
- Revert initial ARCH_HAS_SET_MEMORY support, this needs more work.
- Fix a regression due to ubd refactoring.
- Various small fixes.
-----BEGIN PGP SIGNATURE-----
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=AuP1
-----END PGP SIGNATURE-----