Enhance `docker network rm` to delete multi net

This commit enhance `docker network rm` command to allow user to delete
multi networks at the same time.

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>

docs/reference/commandline/network_rm.md

@@ -10,18 +10,33 @@ parent = "smn_cli"
 
 # network rm
 
-    Usage:  docker network rm [OPTIONS] NAME | ID
+    Usage:  docker network rm [OPTIONS] NETWORK [NETWORK...]
 
-    Deletes a network
+    Deletes one or more networks
 
       --help=false       Print usage
 
-Removes a network by name or identifier. To remove a network, you must first disconnect any containers connected to it.
+Removes one or more networks by name or identifier. To remove a network,
+you must first disconnect any containers connected to it.
+To remove the network named 'my-network':
 
 ```bash
   $ docker network rm my-network
 ```
 
+To delete multiple networks in a single `docker network rm` command, provide
+multiple network names or id's. The following example deletes a network with id
+`3695c422697f` and a network named `my-network`:
+
+```bash
+  $ docker network rm 3695c422697f my-network
+```
+
+When you specify multiple networks, the command attempts to delete each in turn.
+If the deletion of one network fails, the command continues to the next on the
+list and tries to delete that. The command reports success or failure for each
+deletion.
+
 ## Related information
 
 * [network disconnect ](network_disconnect.md)

man/docker-network-rm.1.md

@@ -2,24 +2,39 @@
 % Docker Community
 % OCT 2015
 # NAME
-docker-network-rm - remove a new network
+docker-network-rm - remove one or more networks
 
 # SYNOPSIS
 **docker network rm** 
 [**--help**]
-NETWORK
+NETWORK [NETWORK...]
 
 # DESCRIPTION
 
-Removes a network by name or identifier. To remove a network, you must first disconnect any containers connected to it.
+Removes one or more networks by name or identifier. To remove a network,
+you must first disconnect any containers connected to it.
+To remove the network named 'my-network':
 
-```
+```bash
   $ docker network rm my-network
 ```
 
+To delete multiple networks in a single `docker network rm` command, provide
+multiple network names or id's. The following example deletes a network with id
+`3695c422697f` and a network named `my-network`:
+
+```bash
+  $ docker network rm 3695c422697f my-network
+```
+
+When you specify multiple networks, the command attempts to delete each in turn.
+If the deletion of one network fails, the command continues to the next on the
+list and tries to delete that. The command reports success or failure for each
+deletion.
+
 # OPTIONS
 **NETWORK**
-  Specify network name
+  Specify network name or id
 
 **--help**
   Print usage statement