Allow specifying non default port for wxFTP connections.

Add a wxFTP::Connect() overload taking a port number.

Also specify the default port (21) explicitly if resolving "ftp" service name
failed.

Closes #12145.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64621 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/protocol/ftp.h

@@ -112,6 +112,22 @@ public:
 
 
 
+    //@{
+    /**
+        Connect to the FTP server to default port (21) of the specified @a host.
+     */
+    virtual bool Connect(const wxString& host);
+
+    /**
+        Connect to the FTP server to any port of the specified @a host.
+        By default (@a port = 0), connection is made to default FTP port (21)
+        of the specified @a host.
+
+        @since 2.9.1
+     */
+    virtual bool Connect(const wxString& host, unsigned short port);
+    //@}
+
     /**
         @name Functions for managing the FTP connection
      */