- Do not call cleanup() in usage() (read: before fd_init()). Doing so can
mangle your terminal badly (in fact, it does very noticeably on Linux)
- While here, trim Makefile header, improve COMMENT, use MANPREFIX when
installing manual pages, sort knobs, et cetera
Submitted by: Andy Xie (andy.xie.sz@gmail.com)
Approved by: delphij (maintainer)
Feature safe: yes