In spite of this idea is similar to http://plasticscm.uservoice.com/forums/15467-general/suggestions/2982727-add-ssl-wildcard-certificate-support but all the same I've decided write it in separate topic.

I've tried to use sertificate with SAN (Subject Alternative Name) extention and was failed with one. The main subject of my certificate, for example, is www.domain.tld (i.e. CN=www.domain.tld) but there is also record for SAN like this:
X509v3 Subject Alternative Name:
DNS:www.domain.tld, DNS:domain.tld

So this certificate validates two domains and as I know such type of certificates is widely used (of cause, often by small teams J) so it would be good to support it.