CCW: Separate normative and descriptive sections.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
Feedback: net: separate normative and instructional text.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
block: separate normative and descriptive text.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
Feedback: console & entropy: separate normative and descriptive texts.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
Feedback: SCSI: Separate normative and descriptive texts.

This could use some more rigour, I think: there are still many
implied requirements which could be called out.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
Feedback: Separate normative requirements for Reserved Feature Bits.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
Feedback: VIRTIO-77 Conformance clause.

Now we have grouped all the normative statements, the conformance
clauses for drivers and devices can simply reference them.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
VIRTIO-28: Deprecate balloon device, add number for new one.

Signed-off-by: Rusty Russell <rusty@au1.ibm.com>