It seems that login.app is dead and gone. The homepage is not reachable anymore. The last update to tree was 17 months ago.
It would be a good idea to remove it and replace it with its successor slim, which is already in sunrise.
There is also another lightweight login-manager out there, it is called "enter" see:
I can not speak for enter as i have not tested it yet, but slim is quite useful, especially for xcfe-users who don't want to install gdm or kdm with it`s dependencies. Okay there is xdm, but is is rather ugly. Image you have a nice splash theme at startup and a nice configured desktop and between the xdm login manager.
x11-misc/slim added to tree, x11-misc/login-app masked for removal in 30 days.