merged changes from trunk

git-svn-id: http://libtorrent.googlecode.com/svn@9771 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
fix logging for banning web seeds

git-svn-id: http://libtorrent.googlecode.com/svn@9772 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
merged changes from RC_0_16

git-svn-id: http://libtorrent.googlecode.com/svn@9773 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda