Allow changing mtu; set default low

entrypoint.sh

@@ -1,7 +1,5 @@
 #!/bin/sh
 
-# Sample from https://github.com/traefik/traefik-library-image/blob/5070edb25b03cca6802d75d5037576c840f73fdd/v3.1/alpine/entrypoint.sh
-
 set -e
 
 # first arg is `-f` or `--some-option`
@@ -9,13 +7,4 @@ if [ "${1#-}" != "$1" ]; then
     set -- gerbil "$@"
 fi
 
-# if our command is a valid Gerbil subcommand, let's invoke it through Gerbil instead
-# (this allows for "docker run gerbil version", etc)
-if gerbil "$1" --help >/dev/null 2>&1
-then
-    set -- gerbil "$@"
-else
-    echo "= '$1' is not a Gerbil command: assuming shell execution." 1>&2
-fi
-
 exec "$@"