Add zsh completion for 'docker network connect --alias' and 'docker {create, run} --net-alias'

Signed-off-by: Steve Durrheimer <s.durrheimer@gmail.com>

contrib/completion/zsh/_docker

@@ -291,9 +291,10 @@ __docker_network_subcommand() {
     opts_help=("(: -)--help[Print usage]")
 
     case "$words[1]" in
-        (connect|disconnect)
+        (connect)
             _arguments $(__docker_arguments) \
                 $opts_help \
+                "($help)*--alias=[Add network-scoped alias for the container]:alias: " \
                 "($help -)1:network:__docker_networks" \
                 "($help -)2:containers:__docker_containers" && ret=0
             ;;
@@ -311,6 +312,12 @@ __docker_network_subcommand() {
                 "($help)*--subnet=[Subnet in CIDR format that represents a network segment]:IP/mask: " \
                 "($help -)1:Network Name: " && ret=0
             ;;
+        (disconnect)
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help -)1:network:__docker_networks" \
+                "($help -)2:containers:__docker_containers" && ret=0
+            ;;
         (inspect)
             _arguments $(__docker_arguments) \
                 $opts_help \
@@ -495,6 +502,7 @@ __docker_subcommand() {
         "($help)--mac-address=[Container MAC address]:MAC address: "
         "($help)--name=[Container name]:name: "
         "($help)--net=[Connect a container to a network]:network mode:(bridge none container host)"
+        "($help)*--net-alias=[Add network-scoped alias for the container]:alias: "
         "($help)--oom-kill-disable[Disable OOM Killer]"
         "($help)--oom-score-adj[Tune the host's OOM preferences for containers (accepts -1000 to 1000)]"
         "($help -P --publish-all)"{-P,--publish-all}"[Publish all exposed ports]"