tlsmgr(8) on macOS

The text ec68a0ac671e, as macOS 10.12.6, macOS 10.12.5, macOS 10.12.4, macOS 10.12.3, macOS 10.12.2, macOS 10.12.1, macOS 10.12 shipped it.

Postfix TLS session cache and PRNG manager