The Server header field contains information about the software used by
the UAS to handle the request. Revealing the specific software version of
the server might allow the server to become more vulnerable to attacks
against software that is known to contain security holes. Implementers
SHOULD make the Server header field a configurable option. If the Response
is being forwarded through a proxy, the proxy application must not modify
the ServerHeaders. Instead, it should include a ViaHeader.
Server: HomeServer v2