Wildcard domains

If you put a domain such as example.com in the WILDCARD_DOMAINS list, whenever a route needs a certificate for anything.example.com Centauri will instead replace it with *.example.com.

For example, a route with names example.com test.example.com and admin.example.com will result in a certificate issued for example.com *.example.com. This can be useful if you have a lot of different subdomains, or you don't want a particular subdomain exposed in certificate information.

Note that only one level of wildcard is supported: a wildcard certificate for *.example.com won't match foo.bar.example.com, nor will it match example.com.