docs: public void closeForeignHostSocket(int hostId) {
          Iterator<ForeignHost> it = m_foreignHosts.get(hostId).iterator();
          while (it.hasNext()) {
              ForeignHost fh = it.next();
              if (fh.isUp()) {
                  fh.killSocket();
              }
          }
          reportForeignHostFailed(hostId);
      }