Immutable Configuration Options
Immutable options allow system administrator to provide default settings that can not be changed by the user.
Pre-existing configuration options of the user will be ignored once a configuration option is made immutable.
Options can be controlled either on a per entry basis, per group of entries or on a file by file basis.
If a file or group is immutable, all configuration options for that file or group are immutable, even those options for which the system administrator has no default provided.
The support in applications for immutable options may vary from application to application. Although the user will not be able to make permanent changes to immutable configuration options, the user may still be presented with an user interface option to make such change.
