Make the zoom settings work when not in a window system.
Fix bustage
Also explicitly ask for FixederSys2x for unicode-bmp on X/Wayland
Make it possible to turn off log files; add consult tool
Fix an annoying old warning in this library (non-gmp mode) as well.
Fix gcc warning (false positive) in re2 prog.cc
Improve whitespace routines
Check in PNGs before switching to multi-row format.