Rename to flags and environment variables to content trust

Update help line to allow 90 characters instead of 80

The trust flag pushes out the help description column wider, requiring more room to display help messages.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

docs/reference/commandline/cli.md

@@ -49,8 +49,8 @@ by the `docker` command line:
   unsuitable for Docker.
 * `DOCKER_RAMDISK` If set this will disable 'pivot_root'.
 * `DOCKER_TLS_VERIFY` When set Docker uses TLS and verifies the remote.
-* `DOCKER_TRUST` When set Docker uses notary to sign and verify images.
-  Equates to `--untrusted=false` for build, create, pull, push, run.
+* `DOCKER_CONTENT_TRUST` When set Docker uses notary to sign and verify images.
+  Equates to `--disable-content-trust=false` for build, create, pull, push, run.
 * `DOCKER_TMPDIR` Location for temporary Docker files.
 
 Because Docker is developed using 'Go', you can also use any environment

docs/reference/commandline/create.md

@@ -61,7 +61,7 @@ Creates a new container.
       --restart="no"                Restart policy (no, on-failure[:max-retry], always)
       --security-opt=[]             Security options
       -t, --tty=false               Allocate a pseudo-TTY
-      --untrusted=true           Skip image verification
+      --disable-content-trust=true  Skip image verification
       -u, --user=""                 Username or UID
       --ulimit=[]                   Ulimit options
       --uts=""                      UTS namespace to use

docs/reference/commandline/pull.md

@@ -16,7 +16,7 @@ weight=1
     Pull an image or a repository from the registry
 
       -a, --all-tags=false          Download all tagged images in the repository
-      --untrusted=true        Skip image verification
+      --disable-content-trust=true  Skip image verification
 
 Most of your images will be created on top of a base image from the
 [Docker Hub](https://hub.docker.com) registry.

docs/reference/commandline/push.md

@@ -15,7 +15,7 @@ weight=1
 
     Push an image or a repository to the registry
 
-    --untrusted=true           Skip image signing
+    --disable-content-trust=true   Skip image signing
 
 Use `docker push` to share your images to the [Docker Hub](https://hub.docker.com)
 registry or to a self-hosted one.

docs/reference/commandline/run.md

@@ -65,7 +65,7 @@ weight=1
       -t, --tty=false               Allocate a pseudo-TTY
       -u, --user=""                 Username or UID (format: <name|uid>[:<group|gid>])
       --ulimit=[]                   Ulimit options
-      --untrusted=true           Skip image verification
+      --disable-content-trust=true  Skip image verification
       --uts=""                      UTS namespace to use
       -v, --volume=[]               Bind mount a volume
       --volumes-from=[]             Mount volumes from the specified container(s)