ref: 2bc851eeeffdddce32b002e2d324bd6a7fd0a94f
dir: /bin/gensitemaptxt.rc/
#!/bin/rc
for ( d in sites/*/ ) {
du -a $d | awk '/\.(md|html)$/ { print $2 }; {}' | 9 sed -e 's/\.(md|html)$//' -e 's,/index$,/,' -e 's,^sites/,http://,' > $d/sitemap.txt
}