Case insensitive routes example

This topic was killing me for a long while, since the way to create 
a case insensitive URL was well documented on 1.2 but there is no 
reference in 2.0 other than using regular expressions, but I was 
not aware of how to use inline modifiers for this. The example was
provided in Stackoverflow recently: http://stackoverflow.com/questions/12526099/cakephp-routing-in-php-too