some more refactoring in choker

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10439 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
regenerated html

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10440 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda