Don't exit on dirauths for some config transitions

  o Minor bugfixes:

    - Fix a dirauth-only exit on sighup that could happen during some

      configuration state transitions. We now don't treat it as a fatal

      error when the new descriptor we just generated in init_keys

      isn't accepted. Fixes bug 4438; bugfix on FIXME.

      return -1;

    }

    if (mydesc) {

      was_router_added_t added;

      ri = router_parse_entry_from_string(mydesc, NULL, 1, 0, NULL);

      if (!ri) {

        log_err(LD_GENERAL,"Generated a routerinfo we couldn't parse.");

        return -1;

      }

      if (!WRA_WAS_ADDED(dirserv_add_descriptor(ri, &m, "self"))) {

      added = dirserv_add_descriptor(ri, &m, "self");

      if (!WRA_WAS_ADDED(added)) {

        if (WRA_WAS_REJECTED(added)) {

          log_err(LD_GENERAL, "Unable to add own descriptor to directory: %s",

                  m?m:"<unknown error>");

          return -1;

        } else {

          /* If the descriptor wasn't rejected, that's ok. This can happen

           * when some config options are toggled that affect workers, but

           * we don't really need new keys yet so the descriptor doesn't

           * change and the old one is still fresh. */

          log_info(LD_GENERAL, "Couldn't add own descriptor to directory: %s",

                   m?m:"unknown error>");

        }

      }

    }

  }