ref: 42964d0413f79d441454ac79958a17f76d3a70dd dir: /src/execfs/rules/
# mount -q /srv/magic /usr/web/magic /man2html/([0-9])/([a-zA-Z0-9\.]+) troff -manhtml /sys/man/\1/\2 | troff2html -t '\2(\1)'