Stop asking for the host name in --makepem

Come on, it's a self-signed certificate, how much value does it have anyway?
Also, it gets rid of a question during --makeconf which confuses some people.

This should now use $HOSTNAME and fall back to "host.unknown" if that isn't set.

Signed-off-by: Uli Schlachter <psychon@znc.in>

Utils.cpp

@@ -76,7 +76,7 @@ void CUtils::GenerateCert(FILE *pOut, const CString& sHost) {
 		}
 
 		if (!pHostName) {
-			pHostName = "unknown.com";
+			pHostName = "host.unknown";
 		}
 
 		CString sEmailAddr = pLogName;