Align 'docker commit' docs with the code

It was missing some variants and 'maintainer' isn't actually supported.
Also sorted the list of allowed cmds in the code just to make it easier
to diff with the docs.

Signed-off-by: Doug Davis <dug@us.ibm.com>
Upstream-commit: c88c5588bf
Component: cli

components/cli/docs/reference/commandline/commit.md

@@ -35,7 +35,7 @@ undesired, set the 'p' option to false.
 
 The `--change` option will apply `Dockerfile` instructions to the image that is
 created.  Supported `Dockerfile` instructions:
-`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
+`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`LABEL`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
 
 ## Commit a container
 

components/cli/man/docker-commit.1.md

@@ -29,7 +29,7 @@ people.
 
 **-c** , **--change**=[]
    Apply specified Dockerfile instructions while committing the image
-   Supported Dockerfile instructions: `CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
+   Supported Dockerfile instructions: `CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`LABEL`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
 
 **--help**
   Print usage statement