merged storage allocation mode fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9685 a83610d8-ad2a-0410-a6ab-fc0612d85776
merge invalid assert fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9687 a83610d8-ad2a-0410-a6ab-fc0612d85776
include reason in peer_blocked_alert

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9688 a83610d8-ad2a-0410-a6ab-fc0612d85776