warn when a host's kernel has cgroup memory accounting disabled

static/openapi.json

@@ -12505,6 +12505,9 @@
                         },
                         "name": {
                           "type": "string"
+                        },
+                        "memoryLimitSupported": {
+                          "type": "boolean"
                         }
                       }
                     },
@@ -12523,7 +12526,8 @@
                     "serverVersion": "string",
                     "containers": 0,
                     "images": 0,
-                    "name": "string"
+                    "name": "string",
+                    "memoryLimitSupported": true
                   },
                   "hawser": {}
                 }