Code review comment for lp:~sinzui/launchpad/team-membership-policy-1

Hi Matthew.

I revised https://help.launchpad.net/Teams/CreatingAndRunning#Subscription%20policies to state that open and delegated teams cannot have PPAs. I refrained from stating that owning branches and projects should be avoided since users do engage in the untrusted behaviour.

If you like the the changes I will update the enums and inline help file.