readdir is not guaranteed to be in order

readdir's ordering is filesystem-dependent. On many systems, that means it
might as well be random. People uploading archives will reasonably expect the
files to appear in alphabetical order, so we should make sure they do.

ext/handle_archive/main.php

@@ -74,7 +74,14 @@ class ArchiveFileHandler extends Extension {
 		$list = "";
 
 		$dir = opendir("$base/$subdir");
-		while($filename = readdir($dir)) {
+
+		$files = array();
+		while($f = readdir($dir)) {
+			$files[] = $f;
+		}
+		sort($files);
+
+		foreach($files as $filename) {
 			$fullpath = "$base/$subdir/$filename";
 
 			if(is_link($fullpath)) {