Enable Server Name Indication (SNI) on Ubuntu 12.04 LTS which runs
Apache 2.2. This allows running multiple HTTPS sites from one IP
address/TCP port when SubjectAltNames are specified in the
certificate, but MSIE on WinXP does not support this extension and
so will cease working for HTTPS sites managed by this module. Note
that this behavior is already implicit on Apache 2.4 based platforms
(such as Ubuntu 14.04 LTS).