DOHA, Jan 11 (Reuters) - Complicated Bureaucracy is delaying the launch of Qatar Airways' domestic operations in Saudi Arabia, and they are **w expected to start in six to 18 months, the airline's chief executive was quoted as saying. Saudi Arabia an**unced in 2012 that it would liberalise its domestic air travel market, where currently only national carrier Saudi Arabian Airlines and budget airline flynas serve a customer base of about 30 million people. Foreign carriers can only fly in and out of Saudi Arabia, **t within the country. ...