in *BSD, /bin/sh is Almquist Shell(ash). the 'hash' built-in command of ash
returns 0, always. 'hash' is not usable for find_it() function in
util/fbsetbg and util/fluxbox-generate_menu.in.
this patch changes the behavior of find_it(): when 'hash' is detected to
not work correctly, switch back to 'which'.
this patch is the work of Yamashiro, Jun and appeared first as patch-160
on sourceforge: https://sourceforge.net/p/fluxbox/patches/160/. i submit
it on behalf of the author.