feat(zbm): Define Dropbear's SSH pub keys (#6)

setup.sh

@@ -809,6 +809,17 @@ function ensure_ip_in_kcl () {
     yq -i '.Kernel.CommandLine = "'"${new_kcl}"'"' "${zbm_config}"
 }
 
+function set_pub_keys () {
+    local authorized_keys_file raw_pub_keys
+    authorized_keys_file="${1:?}"
+    raw_pub_keys="${2:?}"
+    :> "${authorized_keys_file}"
+    while IFS= read -r pub_key_line; do
+        printf -- '%s\n' "${pub_key_line}" >> "${authorized_keys_file}"
+    done < <(<<<"${raw_pub_keys}" sed -r -e 's/,,/\n/g')
+    sed -i '/^$/d' "${authorized_keys_file}"
+}
+
 function we_want_ssh () {
     #2.10
     if  [[ "${ARCHZBM_NET_CLIENT_IP}" ]]       || \