Create a client/relay-side ReducedExitPolicy

We should have an "ExitPolicy Reduced" or "ReducedExitPolicy 1" torrc option for relay operators to more easily opt in to https://trac.torproject.org/projects/tor/wiki/doc/ReducedExitPolicy.

We have a lot of people doing this on an ad-hoc basis. We should make it official.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information