quick-setup: allow running script without setup-sshd function (#2381)

* although the setup-sshd function seems useful for certain cases, it is
  generally unrelated to what the rest of the script does and strictly
  not needed for most people
* to allow people to run the script without also modifying the sshd
  config on their servers (which might be considered a security
  violation in some contexts), this patch introduces an additional
  environment variable "SETUP_SSH", which can be set to "false" (or any
  other value than "true") to disable running the setup-sshd function
* to not break backward compatibility and keep the current functionality
  the same, the default value for this variable is set to "true"

Signed-off-by: Jan Klare <[email protected]>

utils/quick-setup.sh

@@ -1,4 +1,5 @@
 DISTRO_TYPE=""
+SETUP_SSHD="true"
 
 # Docker version that will be installed by this install script.
 DOCKER_VERSION="26.1.4"
@@ -262,7 +263,9 @@ function all {
     # check OS to determine distro
     check_os
 
-    setup-sshd
+    if [ "${SETUP_SSHD}" = "true" ]; then
+        setup-sshd
+    fi
 
     install-docker
     post-install-docker