Document the different maintenance status and level

This way we can ask people what the maintenance status and level
of an application is with a clear understanding of what each means.

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

modules/ROOT/pages/glossary.adoc

@@ -66,3 +66,45 @@ Waiting on Reporter:: This marks tickets in which a question was asked to
 
 Waiting on External:: This marks tickets that are blocked waiting on
   something or someone outside of the team.
+
+
+== Application categories
+
+The Fedora Infrastructure runs a fairly larged number of applications. CPE runs
+most of them and maintain (as in maintain the code base, writing code and patches)
+quite a few of them.
+However, not all applications will get the same level of attention from CPE. So
+they have been categorized into two maintenance status and two maintenance level.
+
+Each appliction can then be categorized using these, for example:
+
+- bodhi is: CPE run and maintain - Critical path
+- koji is: CPE run and don't maintain (type a) - Critical path
+- waiverdb is: CPE run and don't maintain (type b) - Critical path
+- simple-koji-ci is: CPE run and don't maintain (type b) - Not critical path
+
+=== Maintenance status
+
+CPE run and maintain:: these are the applications that we run and for which the
+  team is responsible for the code base. We lead the project upstream and run it
+  in the infrastructure. If something break, we will look at it and if that
+  requires patching we will do it.
+
+CPE run and don't maintain:: these are applications that are running in the
+  infrastructure but for which we do not write the code base. There are two
+  types of applications in this sections:
+    - a) applications that for which we look after the deployment
+    - b) applications for which other people look after the
+       deployment, in which case our work can be described as providing "power and pings",
+       in other words, providing power and network. If something goes wrong, we will
+       try to restart the service and if the service doesn't recove, we will contact
+       the maintainers of the application.
+
+=== Maintenance level
+
+Critical path:: these are applications that are needed to build or ship one
+  of our deliverables to our users.
+
+Not critical path:: these are applications that while important for the
+  community will not impact the production or delivery of the project's
+  artifacts.