CAS configuration mispelled, logout failure

[olivierbicler]

When using CAS plugin, logout is impossible.

File plugins/Authentication/CAS/CAS.config.dist.php contains a mispell :
$conf['settings']['cas_logout_servers'] = ''; // Comma separated list of servers to use for logout. Leave blank to not use cas logout servers

Setting name should be separated by points, not underscores :
$conf['settings']['cas.logout.servers'] = ''; // Comma separated list of servers to use for logout. Leave blank to not use cas logout servers