docs: add a few missing glossary definitions

Change-Id: I2fe4c79c8da760837c9f4599a8772c22aec105c6
docs: describe notify cc, give extra hints about shared administration

Change-Id: I29a663a8b50cdc647a6da7879bc3fca625a05c7b
recipes with <hostRequires force=""/> are not virtualisable

Bug: 1136144
Change-Id: I4e2866dc80fbda0ec58fe821a5277b103a703497