fix python binding build on linux for pthread linking

git-svn-id: http://libtorrent.googlecode.com/svn@9865 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
reformatting of some comments

git-svn-id: http://libtorrent.googlecode.com/svn@9866 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
fix test_disk_fence

git-svn-id: http://libtorrent.googlecode.com/svn@9867 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda