add sanity check for SELF_URL_PATH being kept at default value (refs #349)

config.php-dist

@@ -7,7 +7,7 @@
 	define('DB_PASS', "XXXXXX");
 	//define('DB_PORT', '5432'); // when neeeded, PG-only
 
-	define('SELF_URL_PATH', 'http://localhost/tt-rss');
+	define('SELF_URL_PATH', 'http://local.host/tt-rss');
 	// Full URL of your tt-rss installation. You need to set this option
 	// correctly for tt-rss to function properly.
 

sanity_check.php

@@ -151,6 +151,10 @@
 		$err_msg = "PHP: DOMDocument extension not found.";
 	}
 
+	if (SELF_URL_PATH == "http://local.host/tt-rss") {
+		$err_msg = "config: please set SELF_URL_PATH to the correct value";
+	}
+
 	if (!ISCONFIGURED) {
 		$err_msg = "config: please read config.php completely.";
 	}