Missing field label in server config (Fixes: #3856)

Author: Florian Schaal

interface/web/admin/lib/lang/de_server_config.lng

@@ -173,6 +173,7 @@ $wb['awstats_settings_txt'] = 'AWStats Einstellungen';
 $wb['backup_mode_txt'] = 'Backupmodus';
 $wb['backup_mode_userzip'] = 'Backup Dateien gehören dem Web Benutzer (.zip Datei)';
 $wb['backup_mode_rootgz'] = 'Backup aller Dateien des Webverzeichnisses als Root Benutzer';
+$wb['backup_time_txt'] = 'Backupzeit';
 $wb['firewall_txt'] = 'Firewall';
 $wb['mailbox_quota_stats_txt'] = 'E-Mailkonto Beschränkung Statistiken';
 $wb['enable_ip_wildcard_txt'] = 'IP Adressen Wildcard (*) aktivieren';

interface/web/admin/lib/lang/en_server_config.lng

@@ -101,6 +101,7 @@ $wb["fastcgi_config_syntax_txt"] = 'FastCGI config syntax';
 $wb["backup_mode_txt"] = 'Backup mode';
 $wb["backup_mode_userzip"] = 'Backup web files owned by web user as zip';
 $wb["backup_mode_rootgz"] = 'Backup all files in web directory as root user';
+$wb["backup_time_txt"] = 'Backup time';
 $wb["server_type_txt"] = 'Server Type';
 $wb["nginx_vhost_conf_dir_txt"] = 'Nginx Vhost config dir';
 $wb["nginx_vhost_conf_enabled_dir_txt"] = 'Nginx Vhost config enabled dir';