cli: Add server OS/Arch info to 'version' cmd

Signed-off-by: Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>

docs/sources/reference/api/docker_remote_api.md

@@ -46,6 +46,11 @@ You can still call an old version of the API using
 
 ### What's new
 
+`GET /version`
+
+**New!**
+This endpoint now returns `Os`, `Arch` and `KernelVersion`.
+
 ## v1.17
 
 ### Full Documentation

docs/sources/reference/api/docker_remote_api_v1.18.md

@@ -1471,10 +1471,13 @@ Show the docker version information
         Content-Type: application/json
 
         {
-             "ApiVersion": "1.12",
-             "Version": "0.2.2",
-             "GitCommit": "5a2a5cc+CHANGES",
-             "GoVersion": "go1.0.3"
+             "Version": "1.5.0",
+             "Os": "linux",
+             "KernelVersion": "3.18.5-tinycore64",
+             "GoVersion": "go1.4.1",
+             "GitCommit": "a8a31ef",
+             "Arch": "amd64",
+             "ApiVersion": "1.18"
         }
 
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