Version 2.0.20 of Mosquitto has been released. This is a bugfix release. Broker Fix QoS 1 / QoS 2 publish incorrectly returning "no subscribers". Closes #3128. Open files with appropriate access on Windows. Closes #3119. Don't allow invalid response topic values. Fix some strict protocol compliance issues. Closes #3052. Client library Fix cmake build on OS X. Closes #3125. Build Fix build on NetBSD
