The important bit is that when you have $cfg->showloginsideblock = false; that you should
1) see a "Login" link at the top right 2) and see the "Links and resources" block 3) but no "Login" sideblock
And if you have $cfg->showloginsideblock = true, you should
1) not see a "Login" link at the top right 2) see the "Links and resources" block 3) and see the "Login" sideblock
The important bit is that when you have $cfg->showlogin sideblock = false; that you should
1) see a "Login" link at the top right
2) and see the "Links and resources" block
3) but no "Login" sideblock
And if you have $cfg->showlogin sideblock = true, you should
1) not see a "Login" link at the top right
2) see the "Links and resources" block
3) and see the "Login" sideblock