Updated the documentation to explain the fields in the SCC to control the sysctrls

Removed '/or' to meet the standards of the IBM Style Guide.

pick 33906978f Updated the documentation to explain the fields in the SCC to control the sysctrls

Author: EricPonvelle

modules/nodes-containers-sysctls-unsafe.adoc

@@ -6,11 +6,16 @@
 = Enabling unsafe sysctls
 
 A cluster administrator can allow certain unsafe sysctls for very special
-situations such as high-performance or real-time application tuning.
+situations such as high performance or real-time application tuning.
 
 If you want to use unsafe sysctls, a cluster administrator must enable them
 individually for a specific type of node. The sysctls must be namespaced.
 
+You can further control which sysctls can be set in pods by specifying lists of sysctls or sysctl patterns in the `forbiddenSysctls` and `allowedUnsafeSysctls` fields of the Security Context Constraints.
+
+- The `forbiddenSysctls` option excludes specific sysctls.
+- The `allowedUnsafeSysctls` option controls specific needs such as high performance or real-time application tuning.
+
 [WARNING]
 ====
 Due to their nature of being unsafe, the use of unsafe sysctls is
@@ -20,7 +25,7 @@ containers, resource shortage, or breaking a node.
 
 .Procedure
 
-. Add a label to the machine config pool where the containers where containers 
+. Add a label to the machine config pool where the containers where containers
 with the unsafe sysctls will run:
 +
 [source,terminal]
@@ -59,7 +64,7 @@ spec:
 ----
 <1> Specify the label from the machine config pool.
 <2> List the unsafe sysctls you want to allow.
- 
+
 . Create the object:
 +
 [source,terminal]
@@ -119,4 +124,3 @@ $ oc get machineconfig 99-worker-XXXXXX-XXXXX-XXXX-XXXXX-kubelet -o json | grep
 ----
 +
 You can now add unsafe sysctls to pods as needed.
-