update description of SELF_URL_PATH

config.php-dist

@@ -18,11 +18,13 @@
 	// *** Basic settings (important!) ***
 	// ***********************************
 
-	define('SELF_URL_PATH', 'http://example.org/tt-rss/');
-	// Full URL of your tt-rss installation. This should be set to the
-	// location of tt-rss directory, e.g. http://example.org/tt-rss/
-	// You need to set this option correctly otherwise several features
-	// including PUSH, bookmarklets and browser integration will not work properly.
+	define('SELF_URL_PATH', 'https://example.org/tt-rss/');
+	// This should be set to a fully qualified URL used to access
+	// your tt-rss instance over the net.
+	// The value should be a constant string literal. Please don't use
+	// PHP server variables here - you might introduce security
+	// issues on your install and cause hard to debug problems.
+	// If your tt-rss instance is behind a reverse proxy, use the external URL.
 
 	define('SINGLE_USER_MODE', false);
 	// Operate in single user mode, disables all functionality related to