man applet can't display posix manpages (3p)

[John Spencer]

hello, the current man implementation will iterate over this list
sec_list = xstrdup("1:2:3:4:5:6:7:8:9");
this prevents man 3p, 1p, etc manpages to be displayed.

prominent candidates that can't be used are
posix programmer manual: 
http://www.kernel.org/pub/linux/docs/man-pages/man-pages-posix/man-pages-posix-2003-a.tar.xz
ncurses (uses man 3x or man 3NCURSES)

imo the man applet should loop over the directories in the manpath, and 
look into every subdir that starts with "man".
if you can point me to which libbb function can/should be used to 
iterate over a directory tree, i can try to implement it and send a patch.

--JS