[nextcloud_] Allow to control warnings on the number of available updates

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

plugins/nextcloud/nextcloud_

@@ -1,4 +1,5 @@
 #!/bin/sh
+# shellcheck shell=dash
 
 set -e
 
@@ -30,6 +31,7 @@ env.username <nexcloud_user>
 env.password <nextcloud_password>
 env.api_path <default: /ocs/v2.php/apps/serverinfo/api/v1/info>
 env.timeout <default: 2s>
+env.updates_warning <default: 1>
 
 It's advised to set an app password (for this plugin) in your nextcloud 
 instance and not to use the "real" password of your nextcloud user.
@@ -59,12 +61,12 @@ fi
 API_PATH="${api_path:-/ocs/v2.php/apps/serverinfo/api/v1/info}?format=json"
 DOMAIN="${0##*nextcloud_}"
 TIMEOUT="${timeout:-2}"
+UPDATES_WARNING="${updates_warning:-1}"
 CLEANDOMAIN="$(clean_fieldname "$DOMAIN")"
 USERNAME="${username:-}"
 PASSWORD="${password:-}"
 
 print_json_data() {
-    # shellcheck disable=SC2039
     local FIRST="$1"
     [ -z "$FIRST" ] && exit 0
     shift 1
@@ -202,7 +204,7 @@ graph_category cloud
 num_updates_available.label available app updates
 num_updates_available.info number of available app updates
 num_updates_available.min 0
-num_updates_available.warning 1
+num_updates_available.warning ${UPDATES_WARNING}
 num_installed.label installed apps
 num_installed.info number of installed apps
 num_installed.min 0