Fix #3593

Revert "fixes" for #167, #388, #705 (also #1326) as it turns out
URL-decoding isn't compliant with the CGI/1.1 specification.

RFC 3875: http://www.faqs.org/rfcs/rfc3875.html
diff --git a/application/config/config.php b/application/config/config.php
index 306fc2c..7d5c24c 100644
--- a/application/config/config.php
+++ b/application/config/config.php
@@ -37,17 +37,16 @@
 |--------------------------------------------------------------------------
 |
 | This item determines which server global should be used to retrieve the
-| URI string.  The default setting of 'AUTO' works for most servers.
+| URI string.  The default setting of 'REQUEST_URI' works for most servers.
 | If your links do not seem to work, try one of the other delicious flavors:
 |
-| 'AUTO'		Default - auto detects
-| 'CLI' or 'argv'	Uses $_SERVER['argv'] (for php-cli only)
-| 'PATH_INFO'		Uses $_SERVER['PATH_INFO']
-| 'REQUEST_URI'		Uses $_SERVER['REQUEST_URI']
-| 'QUERY_STRING'	Uses $_SERVER['QUERY_STRING']
+| 'REQUEST_URI'    Uses $_SERVER['REQUEST_URI']
+| 'QUERY_STRING'   Uses $_SERVER['QUERY_STRING']
+| 'PATH_INFO'      Uses $_SERVER['PATH_INFO']
 |
+| WARNING: If you set this to 'PATH_INFO', URIs will always be URL-decoded!
 */
-$config['uri_protocol']	= 'AUTO';
+$config['uri_protocol']	= 'REQUEST_URI';
 
 /*
 |--------------------------------------------------------------------------