3.17.3 ====== * yelp-build: Fix some broken and non-portable expr usage, #743911 * yelp-build: Fixed media copying with -i for Mallard * yelp-build: Added support for Mallard Sites to cache generator * yelp-check: Sites support for ids, hrefs, validate, comments, license * yelp-check: Accept -h as well as --help