seed mode fixes

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9789 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix indentation in docs

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9792 a83610d8-ad2a-0410-a6ab-fc0612d85776
curve25519 -> ed25519

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9793 a83610d8-ad2a-0410-a6ab-fc0612d85776