Documentation for filtering events by label

Signed-off-by: Daniel Nephin <dnephin@docker.com>

docs/reference/api/docker_remote_api.md

@@ -88,6 +88,7 @@ This section lists each version from latest to oldest.  Each listing includes a
 list of DNS options to be used in the container.
 * `POST /build` now optionally takes a serialized map of build-time variables.
 * `GET /events` now includes a `timenano` field, in addition to the existing `time` field.
+* `GET /events` now supports filtering by image and container labels.
 * `GET /info` now lists engine version information.
 * `GET /containers/json` will return `ImageID` of the image used by container.
 * `POST /exec/(name)/start` will now return an HTTP 409 when the container is either stopped or paused.
@@ -181,6 +182,3 @@ to add, and the field `CapDrop`, which specifies a list of capabilities to drop.
 * `POST /images/create` th `fromImage` and `repo` parameters supportthe
 `repo:tag` format. Consequently,  the `tag` parameter is now obsolete. Using the
 new format and the `tag` parameter at the same time will return an error.
-
-
-

docs/reference/api/docker_remote_api_v1.21.md

@@ -233,7 +233,7 @@ Json Parameters:
 -   **CpuShares** - An integer value containing the container's CPU Shares
       (ie. the relative weight vs other containers).
 -   **CpuPeriod** - The length of a CPU period in microseconds.
--   **Cpuset** - Deprecated please don't use. Use `CpusetCpus` instead. 
+-   **Cpuset** - Deprecated please don't use. Use `CpusetCpus` instead.
 -   **CpusetCpus** - String value containing the `cgroups CpusetCpus` to use.
 -   **CpusetMems** - Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.
 -   **BlkioWeight** - Block IO weight (relative weight) accepts a weight value between 10 and 1000.
@@ -1363,7 +1363,7 @@ or being killed.
 
 Query Parameters:
 
--   **dockerfile** - Path within the build context to the Dockerfile. This is 
+-   **dockerfile** - Path within the build context to the Dockerfile. This is
         ignored if `remote` is specified and points to an individual filename.
 -   **t** – A repository name (and optionally a tag) to apply to
         the resulting image in case of success.
@@ -2038,9 +2038,10 @@ Query Parameters:
 -   **since** – Timestamp used for polling
 -   **until** – Timestamp used for polling
 -   **filters** – A json encoded value of the filters (a map[string][]string) to process on the event list. Available filters:
+  -   `container=<string>`; -- container to filter
   -   `event=<string>`; -- event to filter
   -   `image=<string>`; -- image to filter
-  -   `container=<string>`; -- container to filter
+  -   `label=<string>`; -- image and container label to filter
 
 Status Codes:
 

docs/reference/commandline/events.md

@@ -48,9 +48,10 @@ container container 588a23dac085 *AND* the event type is *start*
 
 The currently supported filters are:
 
-* container
-* event
-* image
+* container (`container=<name or id>`)
+* event (`event=<event type>`)
+* image (`image=<tag or id>`)
+* label (`label=<key>` or `label=<key>=<value>`)
 
 ## Examples
 
@@ -133,4 +134,3 @@ relative to the current time on the client machine:
     2014-05-10T17:42:14.999999999Z07:00 4386fb97867d: (from ubuntu-1:14.04) stop
     2014-05-10T17:42:14.999999999Z07:00 7805c1d35632: (from redis:2.8) die
     2014-09-03T15:49:29.999999999Z07:00 7805c1d35632: (from redis:2.8) stop
-