Use Listen and Listen4 in --makeconf

Before this, --makeconf used "Listen" if you said "no" to "do you want ipv6?"
and "Listen6" else. Since yesterday, "Listen" means "v4 and v6 please" (thanks
to DarthGandalg) which means we now use "Listen4" for "no" and "Listen" else.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1817 726aef4b-f618-498e-8847-2d620e286838

znc.cpp

@@ -667,10 +667,10 @@ bool CZNC::WriteNewConfig(const CString& sConfigFile) {
 	}
 #endif
 
-	CString s6 = " ";
+	CString s6 = "4";
 #ifdef HAVE_IPV6
 	if (CUtils::GetBoolInput("Would you like ZNC to listen using ipv6?", false)) {
-		s6 = "6";
+		s6 = " ";
 	}
 #endif