Fix typos in comments

Longhorn 2187

Signed-off-by: Eric Weber <eric.weber@suse.com>

Dockerfile.dapper

@@ -13,7 +13,7 @@ ENV DAPPER_DOCKER_SOCKET true
 ENV DAPPER_ENV TAG REPO DRONE_REPO DRONE_PULL_REQUEST DRONE_COMMIT_REF SKIP_TASKS
 ENV DAPPER_OUTPUT bin coverage.out
 # For filesystem freeze tests, our container must be able to see the filesystem mounted in the host mount namespace.
-# Usually, instance-manager runs with the equivalent of "-v /:/host". For integration testing, use "-v /tmp:host/tmp"
+# Usually, instance-manager runs with the equivalent of "-v /:/host". For integration testing, use "-v /tmp:/host/tmp"
 # and mount filesystems to /tmp to simulate this without bind mounting everything.
 ENV DAPPER_RUN_ARGS --privileged --tmpfs /go/src/github.com/longhorn/longhorn-engine/integration/.venv:exec --tmpfs /go/src/github.com/longhorn/longhorn-engine/integration/.tox:exec -v /dev:/host/dev -v /proc:/host/proc --mount type=bind,source=/tmp,destination=/host/tmp,bind-propagation=rslave
 ENV DAPPER_SOURCE /go/src/github.com/longhorn/longhorn-engine

pkg/controller/control.go

@@ -1384,7 +1384,7 @@ func tryFreeze(devicePath string, freezePoint string, mounter mount.Interface, e
 		}
 		mounted = true
 
-		// We must verify it is still save to freeze the filesystem. If the source mount was unmounted by someone else
+		// We must verify it is still safe to freeze the filesystem. If the source mount was unmounted by someone else
 		// before we bind mounted, the bind mount could refer to the root filesystem.
 		var device string
 		device, _, err = mount.GetDeviceNameFromMount(mounter, freezePoint)