Fix phrasing when referring to the freezer cgroup

Signed-off-by: Odin Ugedal <odin@ugedal.com>
(cherry picked from commit 9c94e8260a82d6190204654e2285088c749930dc)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 9da49d0b993511c4e6e0f8f6192b258805475569
Component: engine

Author: odinuge

components/engine/api/swagger.yaml

@@ -4875,7 +4875,7 @@ paths:
                       Note that a running container can be _paused_. The `Running` and `Paused`
                       booleans are not mutually exclusive:
 
-                      When pausing a container (on Linux), the cgroups freezer is used to suspend
+                      When pausing a container (on Linux), the freezer cgroup is used to suspend
                       all processes in the container. Freezing the process requires the process to
                       be running. As a result, paused containers are both `Running` _and_ `Paused`.
 
@@ -5768,9 +5768,9 @@ paths:
     post:
       summary: "Pause a container"
       description: |
-        Use the cgroups freezer to suspend all processes in a container.
+        Use the freezer cgroup to suspend all processes in a container.
 
-        Traditionally, when suspending a process the `SIGSTOP` signal is used, which is observable by the process being suspended. With the cgroups freezer the process is unaware, and unable to capture, that it is being suspended, and subsequently resumed.
+        Traditionally, when suspending a process the `SIGSTOP` signal is used, which is observable by the process being suspended. With the freezer cgroup the process is unaware, and unable to capture, that it is being suspended, and subsequently resumed.
       operationId: "ContainerPause"
       responses:
         204:

components/engine/container/state.go

@@ -17,7 +17,7 @@ import (
 type State struct {
 	sync.Mutex
 	// Note that `Running` and `Paused` are not mutually exclusive:
-	// When pausing a container (on Linux), the cgroups freezer is used to suspend
+	// When pausing a container (on Linux), the freezer cgroup is used to suspend
 	// all processes in the container. Freezing the process requires the process to
 	// be running. As a result, paused containers are both `Running` _and_ `Paused`.
 	Running           bool