Update faq.md
Update faq.md

* use double dashes for consistency
* fixup - says "set it to false", should be "true"
* fixup - the deployment and the daemonset both need this setting

Signed-off-by: Kingdon Barrett <ea7c64223afd52ff1edfca2477cc3b520bc33610@weave.works>

weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope