merged ssl fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@8699 a83610d8-ad2a-0410-a6ab-fc0612d85776
merged fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@8701 a83610d8-ad2a-0410-a6ab-fc0612d85776
merged fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@8703 a83610d8-ad2a-0410-a6ab-fc0612d85776