Adjust OpenBSD patchset 487 to the portable version, and while there drop malloc_options on DragonFlyBSD, and FreeBSD.
Adjust OpenBSD patchset 487 to the portable version, and while there drop
malloc_options on DragonFlyBSD, and FreeBSD.


klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux