windows torrc references @CONFDIR@/tor-exit-notice.html

Two issues:

1. we should not ship the torrc with @CONFDIR@ in it.
2. we should include the tor-exit-notice.html file and set the whole config option correctly.

A user should simply have to uncomment this line to make it work. Most likely, CONFDIR is C:\Documents and Settings\username\Application Data\Tor.