code: function _cmdCloseServer(path, cba) {
      var pathKey = getPathKey(path);
      if (_servers[pathKey]) {
          var serverToClose = _servers[pathKey];
          delete _servers[pathKey];
          serverToClose.close();
          return true;
      }
      return false;
  }
docs: @private
  Handler function for the staticServer.closeServer command. If a server
  exists for the given path, closes it, otherwise does nothing. Note that
  this function doesn't wait for the actual socket to close, since the
  server will actually wait for all client connections to close (which can
  be awhile); but once it returns, you're guaranteed to get a different
  server the next time you call getServer() on the same path.
  
  @param {string} path The absolute path whose server we should close.
  @return {boolean} true if there was a server for that path, false otherwise