LONDON, Feb. 21 - Five years after Britain lifted its ban on gays in the military, the Royal Navy has begun actively encouraging them to enlist and has pledged to make life easier when they do. The navy announced Monday that it had asked Stonewall, a group that lobbies for gay rights, to help it develop better strategies for recruiting and retaining gay men and lesbians. It said, too, that one strategy may be to advertise for recruits in gay magazines and newspapers. Commodore Paul Docherty, director of naval life management, said the service wanted to change the atmosphere so...