code: function _getRemoteAddress( oSocket )
  {
  	let sRet;
  
  	if ( 'object' !== typeof oSocket )
  	{
  		return null;
  	}
  
  	//	...
  	sRet = oSocket.upgradeReq.connection.remoteAddress;
  	if ( sRet )
  	{
  		//
  		//	check for proxy
  		//	ONLY VALID FOR 127.0.0.1 and resources addresses
  		//
  		if ( oSocket.upgradeReq.headers[ 'x-real-ip' ] && _isValidResourceAddress( sRet ) )
  		{
  			//	we are behind a proxy
  			sRet = oSocket.upgradeReq.headers[ 'x-real-ip' ];
  		}
  	}
  
  	return sRet;
  }
docs: get remote address
  
  @private
  @param	{object}	oSocket