quick fix to the iptables docs to show that set_policy is for the default rule on a chain
updated FAQ.
updated to faq file to reword backwards compatibility
Merge remote branch 'upstream/develop' into develop
added a new tutorial based around bootstrap-salt
Merge pull request #8505 from gravyboat/develop

Update to the iptables doc to explain set_policy is for default rules. Also a modification to the FAQ.