generalize array-index name of settings to be settingsgroup_varname

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

actions/admin/settings/185.spf.php

@@ -29,7 +29,7 @@ return [
 			'title' => lng('admin.spfsettings'),
 			'icon' => 'fa-solid fa-clipboard-check',
 			'fields' => [
-				'use_spf' => [
+				'spf_use_spf' => [
 					'label' => lng('spf.use_spf'),
 					'settinggroup' => 'spf',
 					'varname' => 'use_spf',
@@ -38,7 +38,7 @@ return [
 					'save_method' => 'storeSettingField',
 					'overview_option' => true
 				],
-				'spf_entry' => [
+				'spf_spf_entry' => [
 					'label' => lng('spf.spf_entry'),
 					'settinggroup' => 'spf',
 					'varname' => 'spf_entry',