Pull Transmisson's fix for stack-based buffer overflow in libutp
Also fixed upstream but due to breaking API changes net/libutp update
is delayed until consumers adapt, or at least net-p2p/transmission-*.
PR: 196351
Obtained from: https://trac.transmissionbt.com/changeset/13646/
Approved by: bapt (mentor)
Approved by: mi (maintainer)
MFH: 2014Q4
MFH: 2015Q1
Security: CVE-2012-6129
Security: 0523fb7e-8444-4e86-812d-8de05f6f0dce
/branches/2014Q4 and /branches/2015Q1 want the fix becasue
Transmission there uses system libutp, see rP369657.