URL decode rewrite handling: + vs. %20

[locojohn]

You can also use PCRE capturing inside virtual host configuration, to
capture both SCRIPT_FILENAME and PATH_INFO without URL encoding:

location ~ ^(?<SCRIPT_FILENAME>.+\.php)$ {
                  include fastcgi_params;
                  fastcgi_param  SCRIPT_FILENAME
$document_root$SCRIPT_FILENAME;
                  fastcgi_pass ...;
}

location ~ ^(?<SCRIPT_FILENAME>.+\.php)(?<PATH_INFO>.+)$ {
                  include fastcgi_params;
                  fastcgi_param  SCRIPT_FILENAME
$document_root$SCRIPT_FILENAME;
                  fastcgi_param  PATH_INFO $PATH_INFO;
                  fastcgi_param  PATH_TRANSLATED
$document_root$PATH_INFO;
                  fastcgi_pass phpfarm;
                }

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,214668,214792#msg-214792