Copy/paste fix for the issue from EnglishPorterFilterFactory.
Better would be to put some base protected word infrastructure in place that other filters could leverage, but this works for now, and isn't all that horrible
With this, is there any reason to keep EnglishPorterFilterFactory? SnowballPorterFilterFactory with langauge="English" is the same thing, right? Maybe we deprecate EPFF? Objections? Is the reflection thing an issue? The SnowballProgram is created in #create.
The reflection used to be much worse because it was invoked per token. That's been fixed, so now it's just Class.newInstance() per filter creation which shouldn't be as big of a deal.
Bulk close for Solr 1.4