use config var in settings form

mod/settings.php

@@ -1253,6 +1253,7 @@ function settings_content(App $a)
 		'$importcontact' => L10n::t('Import Contacts'),
 		'$importcontact_text' => L10n::t('Upload a CSV file that contains the handle of your followed accounts in the first column you exported from the old account.'),
 		'$importcontact_button' => L10n::t('Upload File'),
+		'$importcontact_maxsize' => Config::get('system', max_csv_file_size, 30720), 
 		'$relocate' => L10n::t('Relocate'),
 		'$relocate_text' => L10n::t("If you have moved this profile from another server, and some of your contacts don't receive your updates, try pushing this button."),
 		'$relocate_button' => L10n::t("Resend relocate message to contacts"),

view/templates/settings/settings.tpl

@@ -198,7 +198,7 @@
 
 <h3 class="settings-heading"><a href="javascript:;">{{$importcontact}}</a></h3>
 <div class="settings-content-block">
-<input type="hidden" name="MAX_FILE_SIZE" value="30720" />
+<input type="hidden" name="MAX_FILE_SIZE" value="{{$importcontact_maxsize}}" />
 <div id="settings-pagetype-desc">{{$importcontact_text}}</div>
 <input type="file" name="importcontact-filename" />
 

view/theme/frio/templates/settings/settings.tpl

@@ -283,7 +283,7 @@
 					<div class="section-content-tools-wrapper">
 
 						<div id="importcontact-relocate-desc">{{$importcontact_text}}</div>
-						<input type="hidden" name="MAX_FILE_SIZE" value="30720" />
+						<input type="hidden" name="MAX_FILE_SIZE" value="{{$importcontact_maxsize}}" />
 						<input type="file" name="importcontact-filename" />
 
 						<br/>