Previously, when the active SELinux value was the same as the desired value, regardless of the value of `persistent`, the module would simply exit successfully, assuming no need for update. This made the assumption that the active and persistent values should be the same, but that is not always the case. This modification treats both the active and persistent values separately when checking for the need to update. Note that the persistent update mode, however, will still update the active as well as the persistent value. If this is not desired, it is possible to separately toggle the active value alone.
Other changes:
* Make the check mode actually perform checks for changes
* Organizes semanage commands into set of logical steps
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