Activist Irenic Capital Management said Tuesday that it would back fellow dissident Starboard Value's push to dissolve the dual-class structure at Rupert Murdoch's News Corp, ahead of a closely watched shareholder meeting.For the last two years, Jeff Smith's Starboard has been mounting a campaign at the media conglomerate, seeking both the dissolution of the dual-class structure that gives the Murdoch family outsize control and for the company to split off its highly-valuable online real-estate business.Ada ...