Add default path for mime.types file; map jpg => image/jpeg in fallback list

program/lib/Roundcube/rcube_mime.php

@@ -717,6 +717,7 @@ class rcube_mime
             $file_paths[] = $mime_types;
 
         // try common locations
+        $file_paths[] = '/etc/mime.types';
         $file_paths[] = '/etc/httpd/mime.types';
         $file_paths[] = '/etc/httpd2/mime.types';
         $file_paths[] = '/etc/apache/mime.types';
@@ -749,7 +750,7 @@ class rcube_mime
         // fallback to some well-known types most important for daily emails
         if (empty($mime_types)) {
             $mime_extensions = @include(RCUBE_CONFIG_DIR . '/mimetypes.php');
-            $mime_extensions += array('gif' => 'image/gif', 'png' => 'image/png', 'jpg' => 'image/jpg', 'jpeg' => 'image/jpeg', 'tif' => 'image/tiff');
+            $mime_extensions += array('gif' => 'image/gif', 'png' => 'image/png', 'jpg' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'tif' => 'image/tiff');
 
             foreach ($mime_extensions as $ext => $mime)
                 $mime_types[$mime][] = $ext;