renaming sample config

plugins/translate/INSTALL

@@ -17,4 +17,4 @@ if the plugin was made correctly.  :)
 
 Some plugin settings might be adjusted by creating config/translate_config.php or
 plugins/translate/config.php configuration file. See plugins/translate/config_default.php 
-and plugins/translate/config-sample.php
+and plugins/translate/config_sample.php

plugins/translate/config_default.php

@@ -103,7 +103,7 @@ $disable_compose_translate=true;
  * If you enable custom translation engines, you must include
  * translate_form_custom(), translate_custom_showtrad() and
  * $translate_custom_showoption() functions in your config.
- * See example in config-sample.php
+ * See example in config_sample.php
  * @global bool $translate_custom_enabled
  */
 global $translate_custom_enabled;