- Remove unused USE_* knobs: databases/mysql57-server games/kajongg textproc/ruby-htree
- Fix typos in USE_* knobs: graphics/fortytwo math/hexcalc misc/gnustep-examples www/h2o
- Remove unused BROKEN_alpha knob: devel/directfb
- Remove user-settable knob: multimedia/tovid
Approved by: portmgr blanket