FLTK port (was "Port Debian Package Management System to Haiku")

[mmu_man]

(looks like I had a draft reply before I got a working account…)

Ah, I finally got a working discuss account

cmake -D CMAKE_BUILD_TYPE=Debug -D CMAKE_INSTALL_PREFIX=/boot/testing-fltk -D OPTION_USE_GL=OFF -D OPTION_HAIKU_SDL=ON …