Using wget 1.13 I'm not sure if this is a bug in wget however i suspect it may be. When you wget https://hostname, wget doesn't send extension server_name in the tls client hello. (Confirmed by browsing using firefox and wget and comparing the wireshark results side by side).
This means if the webserver is hosting multiple websites on different vhosts, it'll use the default website cert instead of the one configured for the hostname you are trying to wget. Mark
