message: Extend `run-dev.sh` script.
  Allow for configuring with the trusted hash.
diff: @@ -6,6 +6,7 @@ set -eu
  BASEDIR=$(readlink -f $(dirname $0))
  CHAINSPEC=$(mktemp -t chainspec_XXXXXXXX --suffix .toml)
  +TRUSTED_HASH="${TRUSTED_HASH:-}"
  run_node() {
  ID=$1
  @@ -22,13 +23,22 @@ run_node() {
  BIND_ADDRESS_ARG=
  fi
  + if ! [ -z "$TRUSTED_HASH" ]
  + then
  + TRUSTED_HASH_ARG=--config-ext=node.trusted_hash="${TRUSTED_HASH}"
  + else
  + TRUSTED_HASH_ARG=
  + fi
  +
  + echo "$TRUSTED_HASH_ARG"
  +
  systemd-run \
  --user \
  --unit node-$ID \
  --description "Casper Dev Node ${ID}" \
  --collect \
  --property=WorkingDirectory=${BASEDIR} \
  - --setenv=RUST_LOG=debug \
  + --setenv=RUST_LOG=trace \
  --property=StandardOutput=file:${LOGFILE} \
  --property=StandardError=file:${LOGFILE}.stderr \
  -- \
  @@ -39,7 +49,8 @@ run_node() {
  --config-ext=storage.path=${STORAGE_DIR} \
  --config-ext=network.gossip_interval=1000 \
  --config-ext=node.chainspec_config_path=${CHAINSPEC} \
  - ${BIND_ADDRESS_ARG}
  + ${BIND_ADDRESS_ARG} \
  + ${TRUSTED_HASH_ARG}
  echo "Started node $ID, logfile: ${LOGFILE}"
  @@ -61,7 +72,7 @@ NODES="$@"
  for i in 1 2 3 4 5; do
  case "$NODES" in
  - *"$i"*) echo "Running node-$i" && run_node $i
  + *"$i"*) run_node $i
  esac
  done;
  