FAQ: firewall issue

do not select "setting firewall" when add a manager host to managerment

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
FAQ: how to fix "add host" failing?

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
FAQ: ovirt guest agent issue

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
FAQ: fix a code highlight issue

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
FAQ: add shutdown issue

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
FAQ: add virtio net issue

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
FAQ: add virtio disk issue

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>