Fixed the link to the usb classes list on usb.org

Author: snicket2100

documentation/rule-language.md

@@ -75,7 +75,7 @@ List of attributes:
 
 `port-id` is a platform specific USB port identification. On Linux it's in the form "b-n" where `b` and `n` are unsigned integers (e.g. "1-2", "2-4", ...).
 
-`interface-type` represents a USB interface and should be formated as three 8-bit numbers in hexadecimal base delimited by colon, i.e. `cc:ss:pp`. The numbers represent the interface class (`cc`), subclass (`ss`) and protocol (`pp`) as assigned by the [USB-IF](http://www.usb.org/about) ([List of assigned classes, subclasses and protocols](http://www.usb.org/developers/defined_class)). Instead of the subclass and protocol number, you may write an asterisk character (`\*`) to match all subclasses or protocols. Matching a specific class and a specific protocol is not allowed, i.e. if you use an asterisk as the subclass number, you have to use an asterisk for the protocol too.
+`interface-type` represents a USB interface and should be formated as three 8-bit numbers in hexadecimal base delimited by colon, i.e. `cc:ss:pp`. The numbers represent the interface class (`cc`), subclass (`ss`) and protocol (`pp`) as assigned by the [USB-IF](http://www.usb.org/about) ([List of assigned classes, subclasses and protocols](https://www.usb.org/defined-class-codes)). Instead of the subclass and protocol number, you may write an asterisk character (`\*`) to match all subclasses or protocols. Matching a specific class and a specific protocol is not allowed, i.e. if you use an asterisk as the subclass number, you have to use an asterisk for the protocol too.
 
 ## Conditions