backend/rss: always use secret key to get uid when it is available instead of defaulting to session information; fix published url syntax being incorrect (closes #287)

backend.php

@@ -474,7 +474,7 @@
 				authenticate_user($link, "admin", null);
 			}
 
-			if ($key && !$_SESSION["uid"]) {
+			if ($key) {
 				$result = db_query($link, "SELECT owner_uid FROM
 					ttrss_access_keys WHERE access_key = '$key' AND feed_id = '$feed'");
 

functions.php

@@ -4093,7 +4093,7 @@
 				"</option>";
 
 			$rss_link = htmlspecialchars(get_self_url_prefix() . 
-				"/backend.php?op=rss&id=$feed_id&is_cat=$is_cat$view_mode$search_q");
+				"/backend.php?op=rss&id=$feed_id&is_cat=$is_cat&view_mode=$view_mode$search_q");
 
 			print "<option value=\"0\" disabled=\"1\">".__('Feed:')."</option>";