mergetool: Add support for Apple Mac OS X's opendiff command
mergetool: Add support for Apple Mac OS X's opendiff command

Signed-off-by: Arjen Laarhoven <3a5c284ecf9af5a1ee3fa961555eb70eb9dacd75@yaph.org>
Signed-off-by: "Theodore Ts'o" <4ed386e0495d3e109932df055831d9ec2f824927@mit.edu>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git