[tor-relays] Reminder: don't run transparent proxies at exits

[Drake Wilson]

Drake Wilson wrote:
> But the TCP specification doesn't.  Nor is the Tor client signaling
> to you that they want an HTTP connection and not a raw TCP connection.
> Whether they happen to be passing octets over it that correspond to an
> HTTP stream is irrelevant.

Or alternatively, let me put the distinction this way:

    "Opera-tor."
  "Could you please find me the number for Pythagoras' Pizza Palace?"
    "Sure, let me get out the copy of the phone book at my desk.  It's
     555-6283."
  "Thanks."

...

    "Opera-tor."
  "Could you please connect me to 555-6283?"
    "Sure."  *beep beep*
  "Pythagoras' Pizza Palace?  I'd like six Scalene Specials delivered for
   J. Random User-Agent."
    "No problem, we'll get that to you in 30 minutes."

...

    "Opera-tor."
  "Could you please connect me to 555-6283?"
    "Sure."  *beep beep*
  "Pythagoras' Pizza Palace?  My client just called me from jail!  You _do_
   remember what 'six Scalene Specials' was supposed to be code for, right?"
    "Oh, this is actually the operator.  I had the right kind of spare,
     fresh pizza lying around already, so I figured..."
  "What?!"
    "Don't worry!  I didn't do anything funny to it!  It's all good!"
  "!!!"

   ---> Drake Wilson