less bashisms in fluxbox-generate_menu
less bashisms in fluxbox-generate_menu

still works with bash or zsh, but fish (now) complains about "cat << EOF" ...

no "grep -q"
BUG: 961

echo is troublesome
POSIX doesn't know a "local" keyword
BUG: 975

seems double comments ## aren't supported everywhere
BUG: 1057

Arkq/fluxbox,luebking/fluxbox,Arkq/fluxbox,luebking/fluxbox,Arkq/fluxbox,luebking/fluxbox,luebking/fluxbox,luebking/fluxbox,Arkq/fluxbox,Arkq/fluxbox