block: Specify -drive legacy option aliases in array Instead of a series of qemu_opt_rename() calls, use an array that contains all of the renames and call qemu_opt_rename() in a loop. This will keep the code readable even when we add an error return to qemu_opt_rename(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: BenoƮt Canet <benoit.canet@nodalink.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>