With the upcoming changes to rebase onto the RHEL 7 STIG controls,
there needs to be a new solution for documentation that is easier
to manage and filter. This patch automates the generation of the STIG
control documentation in the following way:
* A Sphinx extension runs early in the doc build process that writes
all of the individual STIG control docs as well as ToC pages.
* ToC pages are now sorted by severity, tag, and implementation status.
* A giant listing of controls is easier to navigate now.
* Docs are generated from metadata in the /doc/metadata directory. New
documentation only needs to be added there. (Will explain this in
the developer notes in a subsequent patch.)
Implements: blueprint security-rhel7-stig
Change-Id: I455af1121049f52193e98e2c9cb1ba5d4c292386
e57593dfd4