SELinux concepts: Improve documentation.

Clarify that domains are just process types.
Define and clarify attributes.
Remove out-of-context discussion of overrides (not relevant in this section/file).
Fix rule syntax to indicate support for multiple values in each field.
Explain what a chr_file is.
Fix typo.
Clarify system_app (only for system UID apps, not all system apps).
Elaborate on the comment about generic labels.
Fix system_data_file type name.

Change-Id: Iabee4a78ca8af6dbdfd4635229b5dd9abbd5a199
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
1 file changed