Add language to caching in ACP

adm/style/nationalflags_settings.html

@@ -21,7 +21,7 @@ <h1>{{ lang('ACP_FLAG_SETTINGS') }}</h1>
 		</dl>
 		<dl>
 			<dt><label id="flags_cachetime" for="flags_cachetime">{{ lang('FLAGS_CACHETIME') }}</label><br>{{ lang('FLAGS_CACHETIME_EXPLAIN') }}</dt>
-			<dd><input type="number" id="flags_cachetime" name="flags_cachetime" min="30" max="86400" value="{{ FLAGS_CACHETIME }}"> {{ lang('FLAGS_CACHETIME_IN_SECS') }}</dd>
+			<dd><input type="number" id="flags_cachetime" name="flags_cachetime" min="300" max="86400" value="{{ FLAGS_CACHETIME }}"> {{ lang('FLAGS_CACHETIME_IN_SECS') }}</dd>
 		</dl>		
 		<dl>
 			<dt><label for="flags_required">{{ lang('FLAGS_REQUIRED') }}{{ lang('COLON') }}</label><br>{{ lang('FLAGS_REQUIRED_EXPLAIN') }}</dt>

language/en/nationalflags_acp.php

@@ -119,7 +119,7 @@
 	'FLAG_IMAGE_WRONG_SIZE'					=> 'The flag must be exactly %3$s wide and %4$s high. The submitted image is %5$s wide and %6$s high.',
 	'FLAGS_REQUIRE_540'			=> 'This extension requires at least PHP version 5.4.0 and phpBB version 3.1.4-RC1.  Please update your PHP version and/or your phpBB version in order to use the extension.',
 	'FLAGS_CACHETIME'			=> 'Flags cache time',
-	'FLAGS_CACHETIME_EXPLAIN'	=> 'The amount of time before the cache for the flags for users regenerates<br>Default setting is 86400 which is one day (60 seconds * 60 minutes * 24 hours)',
+	'FLAGS_CACHETIME_EXPLAIN'	=> 'The amount of time before the cache for the flags for users regenerates. Setting is based on hours * minutes * seconds.<br>Minimum allowed is <b>300</b> seconds (5 minutes, 1 hour * 5 minutes * 60 seonds)<br>Maximum allowed is <b>86400</b> seconds (24 hours, 24 hours * 60 minutes *  60 seconds)',
 	'FLAGS_CACHETIME_IN_SECS'	=> 'in seconds',
 	'TOO_SMALL_FLAGS_CACHETIME'	=> 'The number chosen for the cache time is too small',
 	'TOO_LARGE_FLAGS_CACHETIME'	=> 'The number chosen for the cache time is too large',