ref: 37d860be30f79410ba695904f24df9b34d3f2a10 dir: /src/execfs/builds/rules/
/index.html /cfg/$sysname/src/execfs/builds/index.rc /man2html/([0-9])/([a-zA-Z0-9\.]+) troff -manhtml /usr/build/code/9front/sys/man/'\1/\2' | troff2html -t '\2(\1)'