minor fixes

      -- the authority rejected a malformed posted document, or

  404 -- the requested document was not found.

      -- the user requested statuses or serverdescs, and none of the ones we

      -- the user requested statuses or serverdescs, and none of the ones

         requested were found (0.2.0.5-alpha and later).

  503 -- we are declining the request in order to save bandwidth

As DirServer, but replaces less of the default directory authorities.

Using AlternateDirAuthority replaces the default Tor directory

authorities, but leaves the hidden service authorities and bridge

authorities in place.  Similarly, Using AlternatieHSAuthority replaces

authorities in place.  Similarly, Using AlternateHSAuthority replaces

the default hidden service authorities, but not the directory or

bridge authorities.