improve regression testing framework

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9804 a83610d8-ad2a-0410-a6ab-fc0612d85776
merged fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9806 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix build

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9807 a83610d8-ad2a-0410-a6ab-fc0612d85776
improve regression test parsing

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9809 a83610d8-ad2a-0410-a6ab-fc0612d85776