bug13814-avoid-exit-paths-no-exits 321 B

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  1. o Minor features (Testing networks):
  2. - Avoid building exit circuits from a consensus with no exits.
  3. Now thanks to our fix for 13718,
  4. we accept a no-exit network as not wholly lost, but
  5. we need to remember not to try to build exit circuits on it.
  6. Closes ticket 13814;
  7. patch by "teor".