+ domain=cal.iankelling.org
+ acme-tiny-wrapper $domain
+ apache-site -f 10.8.0.4:5232 - $domain <<'EOF'
+#https://httpd.apache.org/docs/2.4/mod/mod_authn_core.html#authtype
+ <Directory "/var/www/cal.iankelling.org/html">
+ Options +FollowSymLinks +Multiviews +Indexes
+ AllowOverride None
+ AuthType basic
+ AuthName "Authentication Required"
+ # setup one time, with root:www-data, 640
+ AuthUserFile "/etc/caldav-htpasswd"
+ Require valid-user
+ </Directory>
+EOF
+ # nginx version of above would be:
+ # auth_basic "Not currently available";
+ # auth_basic_user_file /etc/nginx/caldav/htpasswd;
+