handler to update cache when it can't be done as part of a normal apt operation
bundling nginx signing key (needed for installing nginx.org nginx package), since it isn't available for download over HTTPS
default conf templates; nginx_example_ssl.conf is identical to default nginx.org example_ssl.conf, and the nginx_default.conf is the same as the nginx.org with cruft removed and specifying utf-8 as the encoding
in-progress work on nginx role to support using the nginx.org package or an ubuntu package, with the site configuration (via sites-available and sites-enabled) that ubuntu provides available for the nginx.org build too