THE number of new users installing messaging app Signal every day is on track to cross 1 million, putting it closer to levels seen by larger rival WhatsApp, following an update to the Facebook Inc-owned app's privacy policy. About 810,000 users globally installed Signal on Sunday, nearly 18-fold compared with the download numbers on Jan. 6, the day WhatsApp updated its privacy terms, according to data from research firm Apptopia. WhatsApp's new privacy terms reserve the right to share user data, including location and phone number, with its parent Facebook Inc and units such as Instagram and Messenger. Privacy advocates…