Merge pull request #3079 from thaJeztah/20.10_backport_update_docker_stop

[20.10 backport] docs updates

docs/reference/commandline/dockerd.md

@@ -1400,6 +1400,10 @@ This is a full example of the allowed configuration options on Linux:
   "log-driver": "json-file",
   "log-level": "",
   "log-opts": {
+    "cache-disabled": "false",
+    "cache-max-file": "5",
+    "cache-max-size": "20m",
+    "cache-compress": "true",
     "env": "os,customer",
     "labels": "somelabel",
     "max-file": "5",

docs/reference/commandline/stop.md

@@ -19,7 +19,9 @@ Options:
 ## Description
 
 The main process inside the container will receive `SIGTERM`, and after a grace
-period, `SIGKILL`.
+period, `SIGKILL`. The first signal can be changed with the `STOPSIGNAL`
+instruction in the container's Dockerfile, or the `--stop-signal` option to
+`docker run`.
 
 ## Examples