Upgrade to 1.9.1
Use NetBSD clogf for FreeBSD systems that are not at HEAD

Release: WSJT-X Version 1.9.1
                         June 1, 2018
                 -----------------------------

This critical bug fix release repairs an unintended restriction in the FT8
DXpedition mode. It supersedes v1.9.0 and must be used for DXpedition Fox
operators.