message: reactor.network.socket: Rethrow system_error as Exception() in local_endpoint().
diff: @@ -391,7 +391,11 @@ namespace reactor
  PlainSocket<AsioSocket, EndPoint>::local_endpoint() const
  {
  typedef SocketSpecialization<AsioSocket> Spe;
  - return Spe::socket(*this->_socket).local_endpoint();
  + boost::system::error_code erc;
  + auto res = Spe::socket(*this->_socket).local_endpoint(erc);
  + if (erc)
  + throw Exception(erc.message());
  + return res;
  }
  /*-------------.
  