How to upgrade OpenSSH 7.0 to 7.2 on a OpenBSD Unix and Linux

OpenSSH version 7.2 has been released. How do I install or upgrade my existing OpenSSH version to 7.2 on a OpenBSD unix operating system? OpenSSH version 7.2 is primarily a bugfix release. This tutorial explain how to upgrade OpenSSH on OpenBSD 5.8 and Arch Linux.