Remove -h flag from completion and daemon reference

All docker subcommands support `-h` as an alias for `--help`
unless they have `-h` aliased to something else like `docker run`,
which uses `-h` for `--hostname`.

`-h` is not included in the help messages of the commands, though.

It ist visible in
* reference: only in `docker daemon` reference,
  see output of `grep -Rse --help=false docs`
* man pages: only in `docker` man page
  see output of `grep -RF '**-h**' man`

For consistency reasons, this commit removes `-h` as an alias for
`--help` from the reference page, man page and the bash completion.

Signed-off-by: Harald Albers <github@albersweb.de>

contrib/completion/bash/docker

@@ -320,7 +320,7 @@ __docker_signals() {
 _docker_docker() {
 	local boolean_options="
 		$global_boolean_options
-		--help -h
+		--help
 		--version -v
 	"
 
@@ -460,7 +460,7 @@ _docker_create() {
 _docker_daemon() {
 	local boolean_options="
 		$global_boolean_options
-		--help -h
+		--help
 		--icc=false
 		--ip-forward=false
 		--ip-masq=false

docs/reference/commandline/cli.md

@@ -16,7 +16,7 @@ or execute `docker help`:
     $ docker
       Usage: docker [OPTIONS] COMMAND [arg...]
              docker daemon [ --help | ... ]
-             docker [ -h | --help | -v | --version ]
+             docker [ --help | -v | --version ]
 
         -H, --host=[]: The socket(s) to bind to in daemon mode, specified using one or more tcp://host:port, unix:///path/to/socket, fd://* or fd://socketfd.
 

docs/reference/commandline/daemon.md

@@ -32,7 +32,7 @@ parent = "smn_cli"
       -G, --group="docker"                   Group for the unix socket
       -g, --graph="/var/lib/docker"          Root of the Docker runtime
       -H, --host=[]                          Daemon socket(s) to connect to
-      -h, --help=false                       Print usage
+      --help=false                           Print usage
       --icc=true                             Enable inter-container communication
       --insecure-registry=[]                 Enable insecure registry communication
       --ip=0.0.0.0                           Default IP when binding container ports

man/docker.1.md

@@ -23,7 +23,7 @@ its own man page which explain usage and arguments.
 To see the man page for a command run **man docker <command>**.
 
 # OPTIONS
-**-h**, **--help**
+**--help**
   Print usage statement
 
 **--api-cors-header**=""