Looks like I won't be using #emacs #orgmode to build my website any longer. I just figured out how to make #OpenBSD stop griping about "too many open files" when when running "bundle exec jekyll serve".
The answer seems to be "ulimit -n 65536", though for some reason OpenBSD doesn't seem to have a man page for ulimit, and it feels almost like overkill.
@starbreaker Because 'ulimit' is a shell built in command, it is typically documented there. (special commands that modify the shell's own environment, such as 'set', 'cd' and 'ulimit' are almost always shell builtins by necessity)
If your shell is ksh (some googling suggests it may be the default interactive shell on openbsd), try here, which does document "ulimit -n" tersely: http://man.openbsd.org/ksh.1
@stylus Thanks. Evidently bash is similar enough to ksh that I was able to switch to the latter without needing to RTFM for a while. :)