Add ways of fetching GPG keys: ldap and hkp. (Do not add bitcoin this time, due to Torproject-imposed censorship). [(diff)][1] [1]: https://trac.torproject.org/projects/tor/wiki/doc/ReducedExitPolicy?action=diff&version=11 URL: https://trac.torproject.org/projects/tor/wiki/doc/ReducedExitPolicy?version=11