docs: document ssh multiplexing env
@@ -86,6 +86,8 @@ by the `docker` command line:
* `DOCKER_TMPDIR` Location for temporary Docker files.
* `DOCKER_CONTEXT` Specify the context to use (overrides DOCKER_HOST env var and default context set with "docker context use")
* `DOCKER_DEFAULT_PLATFORM` Specify the default platform for the commands that take the `--platform` flag.
+* `DOCKER_SSH_NO_MUX` If set will turn off SSH multiplexing when connecting to daemon through SSH.
+* `DOCKER_SSH_MUX_PERSIST` Set a duration for keeping SSH multiplexing socket alive between commands (e.g `60s`).
Because Docker is developed using Go, you can also use any environment
variables used by the Go runtime. In particular, you may find these useful:
