VC6 doesn't support using keyword (closes #10322)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57705 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/sckaddr.h

@@ -128,9 +128,14 @@ public:
     // IPv4-specific methods:
     bool Hostname(unsigned long addr);
 
-    bool BroadcastAddress();
+    // make base class methods hidden by our overload visible
+    //
+    // FIXME-VC6: replace this with "using IPAddress::Hostname" (not supported
+    //            by VC6) when support for it is dropped
+    wxString Hostname() const { return wxIPaddress::Hostname(); }
+    bool Hostname(const wxString& name) { return wxIPaddress::Hostname(name); }
 
-    using wxIPaddress::Hostname;
+    bool BroadcastAddress();
 
 private:
     virtual void DoInitImpl();